The upper part of the nose is like a back door into the brain because the nerves involved in smell provide a pathway straight into the central nervous system.

鼻腔的上部就如同进入大脑的后门，因为有关嗅觉的神经提供直接进入中枢神经系统的途径。

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A smile is snapped back after using, like a stretchable rubber band.

有的人微笑收发自如，就像可伸可缩的橡皮筋一样。

youdao

She jumped back like a startled rabbit.

她像受惊的兔子似的跳了回去。

《牛津词典》

"For large animals like beef, a very large fraction of the nitrogen that enters the cow's mouth is excreted out the back end."

VOA: special.2011.04.05

When we brought US$1.2 million back to China, it was like peanuts comparing to a lot of other Internet startups in China.

当我们成功融资120万美元回到中国,相比其他新兴互联网公司,这些钱简直就是九牛一毛。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

because they won't come back like some people do in a video game."

因为他们不会像游戏里的一些人一样复活。

电子游戏 - SpeakingMax英语口语达人

The Jets have protected their plans for Tebow like a running back would a pigskin, saying only that the second-stringer would play anywhere between one and 20 snaps per game.

WSJ: Tim Tebow? Mark Sanchez? How About Both?

Andrea motors over rocks, side steps holes, moving like a running back.

NPR: Waging a One-Woman War Against Black Flies

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