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【题目】我们需要它保证我们活着。

【答案】We need it to keep us alive.
【解析】我们we;需要need,它it;保证keep;我们us;活着alive,根据need to sth“需要干某事”和keep sth+形容词“保持---怎么样”这一结构得知句子,所以答案是We need it to keep us alive.

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