Most people think that it's not a smart thing to do-- to try to time the market.

大多数人认为把握市场时机,是不是明智的选择

耶鲁公开课 - 金融市场课程节选

Most of the time, it really is safe. You just have to be smart about it.

大多时候，都很安全。你只要放聪明点就好了。

大城市是否危险？ - SpeakingMax英语口语达人