(单词翻译:单击)
可可电台，每期节目一话题，让英语磨练耳朵的同时学到更多有益的小知识，丰富知识的同时受益于生活。
健康好习惯
Stretch in the morning and at night
早晚都要动动筋骨
Staying physically fit, healthy and injury-free relies heavily on our physical flexibility. As many of us sit behind desks for most of our waking life, our muscles stay stiff and contracted, greatly increasing the chance of injury during unplanned physical activity. To ensure that your body functions as a well-oiled man machine, stretch every morning and night (after a reasonable warm-up, of course) or at least undertake some light physical activity that tests your full range of motion.
保持身材匀称、身体健康不受伤，很大程度上取决于身体的柔韧性。大部分人都是坐办公室的干活，浑身肌肉都很紧，于是不知道什么时候激烈动一下就会容易造成损伤。保证身体机能好，像一座上了油的机器一样正常运转，就要每天早晚热身后动动筋骨，就算不是强度很大的运动，也要左三圈右三圈脖子扭扭屁股扭扭。
【知识点讲解】
undertake vt.承担，从事； 保证； 同意，答应； 承诺
例句：
It seemed a singularly ill-judged enterprise for Truman to undertake.
这对于杜鲁门来说似乎是一项特别不明智的事业。
I can undertake that you will enjoy the play.
我保证你会喜欢这个剧.
We can't undertake that you will make a profit.
我们不能保证你会获利.
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