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drop behind

落伍, 落后

例句与用法:

John and Jack had dropped behind in order to be alone and have a talk.

为了能单独在一起谈谈,约翰和杰克故意走在别人后面。

Soon I dropped behind the rest of the class.

不久我就落在班上其他同志后面了。

落伍; 落后

The production of the factory has been dropping behind in the last few months.

那家工厂的生产量近几个月来一直在下降。