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The ship’s generator broke down and the pumps()(不得不用手工操作) instead of mechanically.
答案:
had to be operated manually
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It may be necessary to stop()(每隔一定時(shí)間) in the learning process and go back to the difficult points in the lessons.
答案:
at intervals
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There’s a man at the reception desk who seems very angry and I think he means()(想找麻煩).
答案:
to make trouble
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