| 单词 | when necessary |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔INCREASE〕Deal with any problems when necessary, so preventing a build-up of strain. 有必要时就处理一下问题，这样就能防止压力的积聚。朗文写作活用〔USE〕Three extra rooms were used as classrooms when necessary. 额外三间房间必要时用作教室。朗文写作活用〔WAY〕He played with the confidence of a winning captain, instinctively changing tactics when necessary. 他比赛时是个胸有成竹的队长，必要时凭直觉改变策略。朗文写作活用〔above〕Lady Travers was not above helping with the housework when necessary.必要时，特拉弗斯夫人会屈尊帮着做家务。麦克米伦高阶〔cane〕I have caned my son when necessary.必要时,我就用藤条打儿子一顿。柯林斯高阶〔cane〕I have caned my son when necessary.我在必要的时候用藤条抽我儿子。外研社新世纪〔disambiguate〕When necessary, the Greek spelling is disambiguated by an appended phonetic transcription.必要时,附注音标可以消除希腊文拼写的歧义。英汉大词典〔fall back on〕When necessary, instinct is the most reliable resource you can fall back on.必要时，最保险的办法就是凭直觉判断。柯林斯高阶〔fall back on〕When necessary, instinct is the most reliable resource you can fall back on.必要时, 最保险的办法就是凭直觉判断。外研社新世纪〔knock〕I'm no woodworker, but I can knock a bookshelf together when necessary.我不是木匠,但必要时我能马马虎虎做成一只书架。英汉大词典〔necessary〕The army needs men who are willing to fight when necessary.军队需要随时愿意听命战斗的士兵。外研社新世纪〔necessary〕The army needs men who are willing to fight, when necessary.军队需要在必要时愿意投入战斗的军人。柯林斯高阶〔necessary〕We are here to give help and support when necessary.如有需要，我们随时提供帮助和支援。牛津搭配〔recourse〕The government, when necessary, has recourse to the armed forces.政府在必要时可以动员军队。牛津高阶〔spark〕They are not afraid to tackle the issues or let the sparks fly when necessary.他们不怕应对这些问题，也不怕必要时来一番激烈的争论。柯林斯高阶〔spark〕They are not afraid to tackle the issues or let the sparks fly when necessary.他们不怕应对这些问题, 也不怕必要时来一番激烈的争论。外研社新世纪〔thick〕Praise them when necessary, but don't lay it on too thick.必要时要表扬他们，但不能言过其实。牛津高阶 |
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