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The engine is used for pumping water out of the mine.
这台发动机是用来从矿井中抽水的。
《牛津词典》
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Remember this engine is running backward, and we're pumping heat up.
记住这个热机是反向运行的，我们把热量向上传输。
youdao
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Remember this engine is running backward, and we're pumping heat up.
记住这个热机是反向运行的，我们把热量向上传输。
youdao