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Pumping recovery well has a low efficiency in system generally at present.
抽油机井目前普遍存在系统效率偏低的问题。
youdao
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Well, you can say that. But with low efficiency.
哦，也可以这么说吧，但学习效率很低。
youdao
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Well, you can say that. But with low efficiency.
哦，也可以这么说吧，但学习效率很低。
youdao