功夫

我想解決這個問題，可是白費功夫。

I tried in vain to deal with the problem.

从中学的时候我就知道，我能够花很多功夫去学习仅仅是因为我过得很寂寞。

從中學的時候我就知道，我能夠花很多功夫去學習僅僅是因爲我過得很寂寞。

I knew since middle school that only because I was so lonely was I able to expend so much energy on studying.

我沒功夫吃飯。

我沒功夫喫飯。

I had no time to eat.

挺好，挺好，下一次再花点儿功夫就成功了。

挺好，挺好，下一次再花點兒功夫就成功了。

Good, good, next time use a bit more effort and you'll succeed.

消防员一眨眼的功夫就把火给灭了。

消防員一眨眼的功夫就把火給滅了。

The firefighters put out the fire in the blink of an eye.