I wanted to go to a party. Especially it was a beach party. It had been almost the only thing my friends had been talking about for the last couple of weeks. But My mom had said no. The more desperately I pleaded her case, the more forcefully my mother said no. “I don’t care who’s going,” said coldly my mother, “you are not going.” I was heartbroken. This was my best friend’s party.

Sunday dinner came around and my grandmother joined the family for the meal. Gran noticed my depression but didn’t say a word. It was my turn to wash up and Gran said, “Let me help you.” “What’s up?” asked Gran as I dumped the dishes into the foaming water. Gran wiped a plate with a tea towel. “Mom won’t let me go to my best friend’s party.” I said sadly. “Has mom explained why she doesn’t want you to go?” asked Gran. “No.” I replied. “Then for a moment, put yourself in her position.” said Gran. “If you were mom, what would your objections be?”

I hadn’t stopped to think about my mom’s side. “Well,” I answered, “it’s a beach party. Maybe she doesn’t trust us or thinks we’ll get into trouble.”

“Are there going to be any adults there?” asked Gran. “No,” I said, “who wants their parents hanging around when you’re trying to have fun?” “Might it just be,” said Gran, “your mother doesn’t want anything unfortunate to happen to you.”“Nothing will happen.” I objected. “Maybe you’re right,” said Gran, “but maybe mom’s worried in case it could.”

Gran looked at me gently, seeming to expect my agreement. For a minute or so, I kept silent, pondering for a while about my eagerness for the party. “Maybe, you are right, however, is there no hope?” I inquired. “Not necessarily.” answered Gran, lost in thought.

Paragraph 1: “Then maybe think of a compromise.” suggested Gran.

Paragraph 2: The long-awaited beach party finally came.

The Mystery of the “Unfriendly” Neighbor

Every morning, Mai would pass her neighbor’s fence with Chó, a German shepherd. For her, walking by Mr. Groll’s yard was the best part of their morning walk and also the worst. It was the best part because the roses along the way seemed to greet them through their scents, “Good morning, Chó,” “Hello, Mai!”. Then the worst part — the unfriendly shape nearby: Mr. Groll. Every time, Mai would offer a polite greeting to Mr. Groll, and Chó, being friendly, would thump (拍打) her tail. Typically, there was no response. Still, Mai knew he was there, watching behind his fence. He sounded out of breath, and the gate swung nervously in his hand.

“Why does Mr. Groll ignore me?” It remained a mystery to Mai. Was he afraid of her because she was blind? Disabilities sometimes scared grown-ups. Then Mai remembered: the previous day, she heard him playing with her friend Jimmy, who was in a wheelchair.

Maybe Mr. Groll didn’t like Vietnamese (越南的) neighbors. Some folks were said to dislike people from faraway places. No, that couldn’t be it. Every Saturday Mr. Groll and Mai’s big brother, Lien, helped each other with yard work. They were friends.

Well, then, Mai thought: “Maybe he doesn’t like me because I’m a girl.” Then she remembered her friend Jana. Mr. Groll would respond happily to her greeting. Mai’s heart twisted: “Mr. Groll likes Jimmy. And Lien. And Jana. But not me and Chó...”

“Me and Chó!” An idea brightened Mai’s mystery. Maybe she did know why Mr. Groll didn’t talk to her!

“Down,” Mai ordered, letting go of Chó’s harness (拴狗绳). Surprised, Chó flopped to the ground. Mai attached her harness to a post, and felt her way along the fence cautiously.

7 . Atomic shapes are so simple that they can’t be broken down any further. Mathematicians are trying to turn to artificial intelligence (AI) for help to build a periodic table of these shapes, hoping it will assist in finding yet-unknown atomic shapes.

Tom Coates at Imperial College London and his colleagues are working to classify atomic shapes known as Fano varieties, which are so simple that they can’t be broken down into smaller components. Just as chemists arranged element s in the periodic table by their atomic weight and group to reveal new insights, the researchers hope that organizing these atomic shapes by their various properties will help in understanding them.

The team has given each atomic shape a sequence of numbers based on its features such as the number of holes it has or the extent to which it bends around itself. This acts as a bar code (条形码) to identify it. Coates and his colleagues have now created an AI that can predict certain properties of these shapes from their bar code numbers alone, with an accuracy of 98 percent.

The team member Alexander Kasprzyk at the University of Nottingham, UK, says that the AI has let the team organize atomic shapes in a way that begins to follow the periodic table, so that when you read from left to right, or up and down, there seem to be general patterns in the geometry (几何) of the shapes.

Graham Nib lo at the University of Southampton, UK, stresses that humans will still need to understand the results provided by AI and create proofs of these ideas. “AI has definitely got unbelievable abilities. But in the same way that telescopes (望远镜) don’t put astronomers out of work, AI doesn’t put mathematicians out of work,” he says. “It just gives us new backing that allows us to explore parts of the mathematical landscape that are out of reach.”

The team hopes to improve the model to the point where missing spaces in its periodic table could point to the existence of unknown shapes.

8 . Fresh fish should have a mild smell. Strong fishy smells are the first signs to go bad. How do the fishy smells come from?

It can be several days from when the fish are caught to when they reach the supermarket. In that time, bacteria that grow naturally in fish start to consume a substance called trimethylamine N-oxide(TMAO)in fish. These bacteria change TMAO into trimethylamine (TMA), the substance responsible for the fishy smells. Bacteria in fish can also change lysine(赖氨酸)into cadaverine(尸胺), a substance that’s associated with breaking down the fish once they are caught and giving off fishy smell.

Chemical reactions can also lead to fishy smells. This happens through the oxidation(氧化)of fat. Fish are an important source of omega-3 fatty acids. When these fats are exposed to oxygen, they oxidize and break down into the substance that you can smell.

To slow down the fishy smell, what is beyond question is that the less time between when the fish are caught and when they reach the kitchen, the better. But today, fish are often flown across the globe. To keep smell-producing bacteria at bay, the fish must be frozen or kept at the low temperature possible as soon as they are caught and cleaned.

Controlling fat oxidation can function as well, especially for fattier fish species. While freezing slows bacterial growth, it does not stop fat oxidation. This reaction will occur as long as oxygen is present. Fatty fish are usually not frozen because, despite the cold temperature, they’re going to oxidize pretty fast unless they are stored in a low oxygen container. That’s why those species are often canned.

It’s also important to remember that smell is not always an indicator of safety, especially in processed fish products. “What you might consider the fishy smell may be a delicacy in another culture,” said Carl A. Batt, a professor of food science at Cornell University.

9 . Ann has been severely paralysed (瘫痪)for more than 18 years. She cannot speak and normally communicates. But now, she has been able to speak through an image on the computer using technology that translated her brain signals into speech and facial expressions.

The advance raises hopes that the technology could be on the edge of transforming the lives of people who have lost the ability to speak due to conditions like strokes (中风).

The latest technology uses tiny electrodes (电极) put on the top layer of the brain to detect electrical activity in the part of the brain that controls speech and face movements. These signals are translated directly into a digital avatar’s (化身) speech and facial expressions including smiling, frowning or surprise.

The team put 253 paper-thin electrodes on the top layer of Ann’s brain over an area important to speech. Afterwards Ann worked with the team to train the system to detect her unique brain signals for various speech sounds by repeating different phrases repeatedly. The computer learned 39 distinctive sounds and a Chat GPT-style language system was used to translate the signals into understandable sentences. This was then used to control an avatar with a voice personalised to sound like Ann’s voice before the injury, based on a recording of her speaking at her wedding.

The technology was not perfect, translating words incorrectly 28% of the time in a test run involving more than 500 phrases, and it generated brain-to-text at a rate of 78 words a minute, compared with the 110–150 words typically spoken in natural conversation. However, scientists said the latest advances in accuracy and speed suggest the technology is now at a point of being practically useful for patients. A crucial next step is to create a wireless form that could be put beneath the skull (颅骨).