In an account of his journey across South America, published in 1836, William Smyth thus complained of frequent "desertion" by his helpers: "Without them it was impossible to get on".

因此，在1836年出版的一本关于他的南美之旅的书中，威廉·史密斯这样抱怨他的助手经常“遗弃”他的行为：“没有他们，我就不可能继续前进。”

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But it wasn't all that long ago that the best minds in the world thought a journey to the moon was utterly impossible.

不过就在不久之前，不少世界上最聪明的人还认为登月不可能实现呢。

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These sizes vary picture, Is impossible with the intravenous drip word to express each person to the journey feeling, Only expresses me by these pictures to life happy reposing and the hope.

这些大小不一的画面，和点滴的只言片语不可能表达每个人对旅途的感受，仅以这些画面表达我对生活美好的寄托和希望。

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As the back-to-school season kicks into high gear, the pressure and anxiety finally starts to subside for young people (and often their parents), who started this journey over a year ago, competing to beat seemingly impossible odds for a spot at a selective college.

FORBES: How to Make a College an Irresistible Brand

Rocks blasted off Mercury by a large impactor would have a difficult journey to reach the Earth, say the researchers - but not impossible.

BBC: Mercury meteorite puzzle