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1.less than 不到；小于
We'll be there in less than no time.
我们马上就到。
2.return to 在家里；在国内
She's planning to return to work once the children start school.
她正计划孩子一入学就恢复上班。
3.be necessary to 对……有必要；为……所必要
It might be necessary to make a few slight modifications to the design.
也许有必要对这个设计稍作几处修改。
4.call for 要求；呼吁
Your plan will call for a lot of money.
你的计划需要许多钱。
