More than two hundred fifty million people do not get enough nutrients from crops to stay healthy.

VOA: special.2009.07.28

but also to just stay happy, stay healthy and happy, so.

同时还要快快乐乐地学习，保持身心健康。

耶鲁对比哈佛 - SpeakingMax英语口语达人

The doctors gave the president suggestions so that he can stay healthy.

VOA: special.2010.03.09

Today,we discuss ideas about how to stay healthy on a long trip.

VOA: special.2009.07.14