白费心机的英文

scheme in vain; bother one's head for nothing; make futile efforts; rack one's brains in vain

• 白费:    labour in vain
• 心机:    thinking; scheming
• 白费心计:    go down the drain

例句与用法

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1. He sought to deceive his parents but in vain
   他试图欺骗他的父母，但是白费心机。
2. We tried in vain to make him change his mind
   我们想使他改变主意，结果是白费心机。
3. He sought to deceive his parents but in vain
   他试图欺骗双亲，但白费心机。
4. I sought to convince her , but in vain
   我企图说服她，但白费心机了。
5. The drowning man called in vain for help
   溺水者白费心机地呼救。