可可電臺，每期節目一話題，讓英語磨練耳朵的同時學到更多有益的小知識，豐富知識的同時受益于生活。

健康好習慣

Stretch in the morning and at night

早晚都要動動筋骨

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.

保持身材勻稱、身體健康不受傷，很大程度上取決于身體的柔韌性。大部分人都是坐辦公室的干活，渾身肌肉都很緊，于是不知道什么時候激烈動一下就會容易造成損傷。保證身體機能好，像一座上了油的機器一樣正常運轉，就要每天早晚熱身后動動筋骨，就算不是強度很大的運動，也要左三圈右三圈脖子扭扭屁股扭扭。

【知識點講解】

undertake vt.承擔，從事； 保證； 同意，答應； 承諾

例句：

It seemed a singularly ill-judged enterprise for Truman to undertake.

這對于杜魯門來說似乎是一項特別不明智的事業。

I can undertake that you will enjoy the play.

我保證你會喜歡這個劇.

We can't undertake that you will make a profit.

我們不能保證你會獲利.

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