A survey showed people were confused about what they should eat to stay healthy.

一项调查表明人们对于保持健康该吃什么很困惑。

By exercising, we can always stay healthy.

通过体育锻炼，我们能够始终保持健康。

Since not everybody is so considerate, do what you can do to stay healthy.

鉴于不是每个人都这么体贴，你要做任何可以让自己保持健康的事情。

Only if you take an active part in physical activity will you be able to keep fit and stay healthy.

你只有积极参加体育锻炼，才能保持身体健康。

Marriages stay healthy the same way.

保持健康的婚姻也是同样的道理。