You can work up a sweat very quickly if you're running fast.

快跑还可以迅速出汗，加速体内的新陈代谢。

You will learn a new skill and work up a sweat at the same time.

这样的话，你在辛勤流汗的同时也学会了一项新技能。

Reina: Stop worrying. Let's go, I'm ready to work up a sweat!

雷纳：别瞎操心了。我们走吧，我一定要跑出个满头大汗！

Well, here's another reason to work up a sweat: Exercise tightens the skin on your entire body.

还有个足够让你运动到大汗淋漓的原因：运动能拉紧整个身体的皮肤。

The low hills offer a good way to work up a sweat. Visitors should take some warm clothing along as temperatures can be a lot lower than in Beijing.

那里的小山是健身的好地方。访客最好带些厚一点的衣服，因为那里的气温可能比北京低不少。