To reduce or avoid it, researchers have examined the effect of smoking,diet, brain-challenging games, exercise and other strategies.

VOA: standard.2010.06.17

you're on a diet and you're on an exercise program.

你在节食，并且有一个健身计划。

I'm ~ing 课堂 - SpeakingMax英语口语达人

you're on a diet and you're on an exercise program.

你在节食，并且有一个健身计划。

I'm ~ing 课堂 - SpeakingMax英语口语达人