1. WhatsApp had been particularly ad-averse before its sale to Facebook. CEO Jan Koum kept a note from co-founder Brian Acton taped to his desk to remind him of the company’s core values. It read: “No Ads! No Games! No Gimmicks!”
2. adj. 传统的
3. The world's first flying bicycle flew on November 9, 1961, when Derek Pigott of the University of Southampton flew in a bicycle with an airplane-like body. It was called the Southampton University Man Powered Aircraft (sumpac). Derek furiously pedaled the air-bike to get it off the ground. It then flew 1.8 meters (about 6 ft) above the ground over a distance of 64 meters (210 ft). While the flight was short and slow, it still does not change the fact that it was the first bicycle to fly and at the same time, the first human-powered flight.
5. “我们的人口和就业正处于历史高位，并在不断增长。这给租金和房价施加了很大压力，”纽约大学富曼房地产及城市政策中心(Furman Center for Real Estate and Urban Policy of New York University)的主任马克·威利斯(Mark Willis)说，“现在没有理由认为这些趋势可能发生改变。”
6. The cities of Hefei and Xiamen once again led the pack with growth of 48.6 per cent and 45.9 per cent, respectively.
'It's been low for a while, says Lee (last year it was ranked 196 out of 200). 'What probably pushed it to the bottom is that several things got worse job prospects decreased, the average salary continued to fall, and work hours continued to rise. Those factors also make the job more stressful.'