1.只有采用这些措施，我们才能减少空气污染。 Only by taking these measures can we reduce the air pollution. 2.只有通过共同努力(combined efforts)，世界才会变得更美丽。 Only through combined efforts will the world become more beautiful. 3.只有当地球被严重地污染了，人们才意识到自己犯了一个不可饶恕(inexcusable)的错误。(注意时态的使用） Only when the earth was seriously polluted, did human beings realize the had made an inexcusable mistake.

作文常用句：用only+状语（从句）的倒装句来翻译成中文