【推荐1】Dwayne Johnson was born Dwayne Douglas Johnson on May 2, 1972, in Hayward, California, United States. His father, Rocky Johnson, was a professional wrestler while his mother, Ata Maivia, was the daughter of a wrestler. His father is of Black Nova Scotian origin, while his mother is of Samoan heritage, which explains his exotic (异国的) looks. Dwayne Johnson, previously employed as a professional wrestler, is an actor known for his appearance in the fantasy adventure film, ‘The Mummy Returns’. A highly successful professional wrestler before making his first attempt into films, Johnson is also famous for his ring name, ‘The Rock’.

Born into a family of wrestlers, it comes as no surprise that he too made a name for himself in the sport. Athletic and fond of sports from a young age, he used to join in many sporting activities as a school student. He played football for his high school and was also a member of the school’s track and field and wrestling teams. He was a promising footballer and received a full scholarship from the University of Miami to play defensive tackle (后卫). He was hopeful of making it big as a professional footballer when an injury put a full-stop to his football ambitions. Though disappointed, he did not let this incident demotivate him and instead decided to become a wrestler. His father, a professional wrestler himself, began training the young man. Eventually Johnson made his WWF debut (首秀) and established himself as a successful wrestler.

Due to his popularity coupled with his attractively strong looks he started receiving offers from Hollywood studios and he began his acting career with the movie, ‘The Mummy Returns’.

【推荐2】In 1970, American magician Rick Johnsson theorized that when magic tricks seem too perfect, audiences are less impressed and can easily figure out their secrets. Johnsson knew few people believed magicians had supernatural powers because they feel certain there is a rational explanation for magic, and it’s often science.

What’s the science behind popular magic tricks? Let’s take a look. Levitating(悬浮)objects A popular trick is making objects levitate, with smaller objects being especially easy to “fly”. To the viewer, the levitating object may seem to resist gravity, but there’s a simple explanation—quantum (量子)physics. Magicians coat an object in a layer of magnetic paint and place it on top of a superconductor cooled by liquid nitrogen. The opposing forces cause the object to float above the superconductor.

Vanishing liquids

Many magicians can make liquids disappear. The explanation is simple—chemistry. Sodium polyacrylate, also known as “waterlock”, is a chennical compound that can absorb liquids. It’s used in everyday products such as baby diapers. What’s magical about this compound is that it can absorb 100 to 1000 times its mass in liquid.

When a magician pours water into a cup lined with sodium polyacrylate, the water is quickly absorbed.

Burning paper

Another interesting trick is when magicians set paper on fire, it remains undamaged. Magicians can even use money in this trick. However, there’s a scientific explanation-chemistry! The item is dipped in a mixture of alcohol and water before the trick. When it’s lit on fire, the alcohol covering the paper begins to burn. Alcohol burns and changes into gas at a much lower temperature than water, so the water protects the paper from burning.

【推荐3】Learning to code (编程) has grown over the years from just a hobby to a career. Today, you can learn coding online. Gone are the days when only few could learn a programming language and learning it cost quite a large amount of money. Have a look at the following coding sites to choose one that suits you best.

Treehouse is a well-known name, especially as an online technology school to teach coding for free. Currently, there are over 1,000 high-quality videos which cover many topics such as web design and website development. Treehouse makes it possible for beginners to learn at their own pace and choose different types of coding languages for all levels. If you are interested in coding but you have no idea where to start, Treehouse will walk you through the entire learning process.

Are you looking for a platform to improve your knowledge of computer science? Code might just be the website you have been waiting for. The website has smartly designed the course. Besides, Code can also be especially helpful for those who are willing to earn money by teaching computer science.

CodeHS is one of the best websites that come with fun programming lessons. It offers a lot of courses with fun games like JavaScript, animation, data structures, game design and puzzle challenges. And CodeHS can teach you to think and solve a problem like a programmer (程序员). CodeHS comes with $25 per month.

Via this online website, you learn to code not only by studying theory but by completing exercises and challenges. What's more, FreeCodeCamp has an active discussion community where you can receive real-time help from professionals, as well as have a chance to exchange ideas with more experienced programmers.