※ 引述《david521 (sue)》之铭言： : 你们好，刚刚读的一段文章，其中的一句为 : Geenhouse gases are necessary because they keep the planet's surface warmer : than it otherwise would be. : 就我的认知，otherwise 为副词，故为何不是it would otherwise be 而是 it otherwis : e would be? : 另外请问这句怎麽翻比较好？ : 谢谢 小弟的理解如下： Greenhouse gases are necessary 温室气体是不可或缺的 because they keep the planet's surface warmer 因为它们能让地球的表面保持温暖 than it otherwise would be. 否则地球就不是现在这样了 这里的otherwise紧跟在it後面， 是为了单独修饰it (it指的是the planet's surface) 而主句既已明示 "Greenhouse gases are necessary"； 反之，就是 the planet's surface without greenhouse gases 详细词意 => than the planet's surface without greenhouse gases would be 使用otherwise单独修饰the planet's surface => than the planet's surface otherwise would be 再使用代名词it => than it otherwise would be --

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