4 . Use Phones Respectfully

You probably spend more time on your smartphone than any other possessions. You take it everywhere—to school, to meals, and even to the bathroom.     1     But we have to learn to use our phones respectfully or at least without offending others around us. Here are some tips for smartphone usage. Take a look.  

Use “do not disturb” instead of “vibrate (振动)”.

Loud vibrations in your trousers are disturbing. People can hear your phone vibrate or not, depending on how violently it vibrates.     2    

Tell others what you’re doing.

Sometimes, you will be in a situation where you need to use your smartphone.     3    If you don’t, people will think that you’re either interacting with someone else or just getting bored.  

    4    

Respect others’ privacy such as text messages and e-mail senders by not letting what they type appear on the home screen of your phone when you receive a new message. While you’re at it, use a password to make sure the information stays between you.

Ask permission to swipe (滑动).

When people hand you their phone to look at a photo, this doesn’t mean you can look through all of their photo albums.     5    

5 . In most towns today, you can see teenagers standing over electronic machines with flashing lights, shooting at spaceships from other planets and dropping bombs on strange monsters (怪兽). The machines have names like Space Warrior, Dark Invader and so on. It used to be believed that damage was done only to those strange visitors from outer space, but now it seems that they are striking back.

Many teenagers like electronic games so much that they can’t stop playing. They spend hours tightly holding the joystick controls and constantly pressing buttons marked “fire”. They develop pains in their fingers because of the constant pressure. They play and play so that the pains have no chance to cure properly. The rapid wrist movement required to guide the spaceship across the screen causes another problem: The muscles of the wrist and arm become so inflamed and swollen (肿胀的) that they press against the bones. This condition is what doctors now call “Space Warrior’s Wrist”.

Other strange aches and pains are also likely to affect the elbows and shoulders. Another even more alarming problem is shown by the case of a 17-year-old girl which was recently in the British Medical Journal. She had been playing various kinds of electronic games for more than two hours a day. Her father repaired games and machines and she could use the cassettes and systems in his workshop as often as she liked. One day, after playing a game called Dark Invader, she lost consciousness and fell to the floor.

Doctors who examined her found she was suffering from an unusual illness caused by lights flashing at a particular frequency.

6 . Ocean heat waves — defined as periods of extreme temperatures lasting five days or more — have become increasingly common in recent decades. In fact, as a new study published in Nature Climate Change finds, Earth’s number of annual ocean heat wave days increased by around 54 percent between 1987 and 2016, with abnormally high temperatures not only occurring more frequently, but also lasting for longer periods of time.

Underwater heat waves pose a significant threat to marine (海洋的) ecosystems, which are already at risk due to issues including overfishing and widespread plastic pollution. Sweeping through oceans much like wildfires blaze through forests on land, extreme temperatures exact damage on foundational organisms such as kelp forests, seagrass meadows and coral reefs. Given that these framework species provide shelter and food to many other ocean creatures, the study’s authors warn that such destruction will likely have cascading consequences for marine biodiversity.

To assess the effects of ocean heat waves, researchers led by ecologist Daniel Smale of Great Britain’s Marine Biological Association turned to 116 previously published academic studies. Reflecting on more than 1,000 ecological records and eight specific heat waves, the scientists identified regions and species that were the weakest to temperature increases. As Mary Papenfuss writes for the Huffington Post, areas of the Pacific, Atlantic and Indian Oceans topped the list, with the Caribbean’s coral reefs, Australia’s seagrass and California’s kelp forests causing particular concerns.

In terms of species, Pacific Standard’s Kate Wheeling adds, the team notes that immobile plants and animals were the hardest hit, while tropical fish and mobile invertebrates (无脊椎生物) were able to cope with the heat by moving to different habitats (栖息地). Interestingly, John Timmer reports for Ars Technica, the researchers actually observed heightened levels of fish diversity during periods of above-average temperatures, likely due to the animals’ mass migration (迁徙) toward friendlier waters. The same trend did not prove true for sea-dwelling birds, however, as shifting habitats limited the avian creatures’ access to prey.

Although the researchers’ findings are most consequential for marine ecosystems. Pierre-Louis and Popovich explain that damage to ocean habitats will also affect humans who rely on fishing and fish farming.

“Certainly there’s going to be changes with climate change to marine communities, but it’s not like the oceans are going to become the dead sea. It’s just that, as a consequence of what we’re doing to the oceans, there’s going to be different marine communities in different places than what we’re used to. Obviously, that is a problem because we’re sort of set up for what the climate is now rather than what it is going to be in the future.”

Being nearsighted is far more common than it once was. The case rate of myopia (近视) in Americans     1     (increase) by 66 percent since the early 1970s, according to a study by the National Eye Institute; in China and other East Asian countries, more than half of recent high school graduates are thought     2     (be) the persons who suffer myopia.

Myopia results when eyeballs are     3     (long) than normal, changing the angle at which light enters the eye and the ability to focus     4     distant objects. The disorder     5     (usual) begins before adolescence, when the eye is growing, but it can worsen in early adulthood.

Some experts connect the myopia to the many hours young people spend in staring at     6     (computer) and other screens. But a recent study published in JAMA Ophthalmology suggests that a greater factor may be a side effect of all that screen-watching — it’s     7     (keep) children inside.

This new study shows that a lack of direct sunlight may damage vision. Strong correlations   (关联) were found between current eyesight and     8     (people) lifetime exposure to sunlight. Those     9     had gotten the most sun, particularly between the ages of 14 and 19, were about 25 percent less likely to have developed myopia by middle age. Exposure to sunlight up to     10     age of 30 also brought a protective benefit.

10 . Student newspapers across the US are facing a dark reality. As they are free to read, they are making less money than ever, meaning that such newspapers are finding it hard to survive.

Most college papers have reduced their print editions (版本). Last year, the Daily Tar Heel printed a paper four days a week. This year, it prints a paper every three days. And while it used to produce around 22,000 newspapers each time, it only makes around: 10,000 now, said Erica Perel, general manager.

Increasingly, student journalists have turned their focus to digital versions of their newspapers, and the new ways that social media allows them to tell stories. They’ve adapted their skills to mirror what’s going on in the professional journalism world.

“I think we’re adapting very well…in moving away from that print edition. But it’s challenging.” said Jonathan Carter, a student at North Carolina State University. So what should student newspapers do? LoMonte said the best solution would be for universities to financially (财经的) support student journalism. University leaders like to talk about producing responsible students, he said, and journalism is a part of that.

In the meantime, campus newspapers are figuring out their financial models as they go along. Bruce dePyssler, adviser to North Carolina Central University’s Campus Echo Newspaper, said his students post one story a day online. The best stories are put together for a once-a-semester print edition.

And even if student journalists don’t go into media jobs, Perel said, “They’ve still had a great education.” “The number one thing that we teach is critical thinking (批判思考) and how to be a lifelong learner, ” she said, “The ones who are living through this transition (过渡) are the ones that are going to be a lot stronger for it in the end.”