Weight loss is a tricky topic. Lots of people are unhappy with their present weight, but most aren't sure how to change it - and many would be better off staying where they are.
减肥是一个很微妙的话题，很大一部分人对他们现在的体重不满意，但是他们中的绝大部分都不清楚如何去改变它——到底减掉多少呢？
The topic of Google's birthday is always a little tricky.
Google的生日问题多少有点复杂。
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