An unlaced shoe may be perfectly clean, but is not tidy.

未系鞋带的鞋可能是很干净的，但不能算是整齐的。

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From this we can know that lost a horse shoe nail may lead to lose a country.

从中我们可以知道，失去了一个马蹄钉可能失去一个国家。

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From this we can know that lost a horse shoe nail may lead to lose a country.

从中我们可以知道，失去了一个马蹄钉可能失去一个国家。

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