【英语时差8,16】马的腿为什么这么细？（上）

时间：2016-02-01 05:17:37

搜索关注在线英语听力室公众号：tingroom，领取免费英语资料大礼包。

（单词翻译）

Why horses have skinny legs? What’s the use of a skinny leg? The answer is Running. The skinniest lower legs belong to the fastest runners. Think of how a deer can move, as opposed to a tortoise. Why is that? It’s because when you run, or indeed walk, you are constantly swinging the bottom halves of your legs. For humans, one foot is stopped and essentially¹ resting on the ground while the other is moving twice as fast as your overall speed.

分享到：

点击

收听单词发音

1 essentially
adv.本质上，实质上，基本上
参考例句：
Really great men are essentially modest.真正的伟人大都很谦虚。 She is an essentially selfish person.她本质上是个自私自利的人。

本文本内容来源于互联网抓取和网友提交，仅供参考，部分栏目没有内容，如果您有更合适的内容，欢迎点击提交分享给大家。