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fall behind,keep on with,keep up with,catch up的区别
人气:193 ℃ 时间:2020-02-03 11:44:49
解答
fall behind: 落后、退后、逾期(付款等)
keep on with:继续(做某事)
keep up with: 跟上
catch up: 追上、吹起等
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