China's first astronaut says he heard mysterious knocks during his first flight in space - but no one has been able to explain the cause of them.中国第一名宇航员称其第一次宇宙飞行时听到神秘的敲击声，但没有人能解释原因。Astronaut Yang Liwei

A record 64.7 million people living in the United States last year spoke a language other than English at home, an increase fueled both by immigration and a growing number of native-born Americans who speak other languages.有报告指出，2015

In a typical classroom, you’ll find children who are exceptionally good at math while some struggle. Some kids seem to be particularly poor at math, though, showing difficulty even when routinely adding or subtracting even after extensive

Apple launched its new iPhone 7 last week.苹果公司上个星期发布了新款的苹果7。This time, the company is using the slogan "This is 7".这次，苹果公司用的标语是：”这就是7”。It's quite dull. But over in Hong Kong, where Cantonese is spoken, th

Want greater success in your career and your love life, as well as a healthy brain long into old age?想要在事业上和爱情