A snail was living on a back of a butterbur leaf.

蜗牛隐居在一片款冬叶后。

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Two snails were living on a back of the butterbur leaves.

两只蜗牛一直生活在款冬叶上。

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A back-of-the envelope calculation suggests China may have accounted for as much as 2 percentage points of annualised growth in inflation-adjusted world output in the second quarter of 2009.

根据粗略计算，2009年第二季度，中国可能为经通胀调整、折合成年率计算的全球产出增幅贡献了高达两个百分点。

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He wanted to see Confederate soldiers go back to their homes to become peaceful citizens of a united country.

VOA: special.2009.12.17

It is going to give me back a tuple a collection of two things, and so check out the syntax.

它将给我返回一个数组或者系列的一对值,然后检查一下语法。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, I don't really know a whole lot, but I know, the alumni come back, a lot of them come back,

嗯，我不是完全了解，但是我知道，校友回来，很多校友回来，

对于返校日 - SpeakingMax英语口语达人

And the second was just a back of the envelope opportunity analysis.

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He went off his left foot to the right and sent a back of the hand to Jones who was racing behind him and crashed over.

BBC: Newcastle 29-24 Dragons

His science was behind the popular Internet download a few years back of a new human ear grown onto the back of a mouse, a photo that turned the collective stomach of a public still queasy about biotechnology.

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