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They pressed on without letup until they got to the top of the hill.他们一鼓作气爬上山顶.He jaws with no letup.他没完没了地讲.We must develop the advanced productive forces without letup.我们必须坚持不懈地发展先进的生产力....
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letup的音标：letup的英式发音音标为：['letʌp]letup的美式发音音标为：['letˌʌp]...
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The surgeons have been working for twenty hous without letup.那些外科医师一连工作了二十小时没有停止。He jaws with no letup.他没完没了地讲.We must develop the advanced productive forces without letup.我们必须坚持不懈地发展先进的生产力.They pressed on without letup ...