The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.
The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.
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The ship’sgenerator broke down and the pumps _____ ( 不得不用手工进行操作 ) instead of mechanically.