According to the work of Professor James Vaupel and his co-researchers, 50% of babies born in the US in 2007 have a life expectancy of 104 or more.
2019年6月四级真题(第一套)阅读 Section B
In response to past critics, Twenge and her co-researchers stress they are not trying to prove that the use of digital devices reduces young people's well-being.
2019年12月六级真题(第一套)阅读 Section B