fell down 和fell off2者有何分别?最好有例子~

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fell down 和fell off2者有何分别?最好有例子~
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fell down 和fell off2者有何分别?最好有例子~
fell down 和fell off
2者有何分别?
最好有例子~

fell down 和fell off2者有何分别?最好有例子~
fall off:To become less; decrease (变少;降低)
例如:Stock prices have fallen off.The number of staff meetings fell off after a few months.(股票价格下降了.工作人员的会议在几个月后减少了.)
fall down:To fail to meet expectations;lag in performance(失败:未能达到预想;在成就上落后)
例如:That young boy fell down on the job.那小伙子工作未能达到预想目标.