I tried very hard to persuade Peter to quit smoking, but in vain.

力劝彼得戒烟，但却白费工夫。

They are a lot of work. I don't have that much time.

养鹦鹉很费工夫， 没有那么多时间照顾它。

The collar where most of the like hardworking meat is, but really flaky, beautiful whitefish.

大部分很费工夫做的，但真的很薄，漂亮的白鱼。

O muse, you work in mysterious ways.

哦 得来全不费工夫 天助也。

This was a waste of time. Couldn't have put it better.

‪-真白费工夫 ‪-可不嘛。

Does it matter? Does any of it? He's just a lunatic, and he'll always let you down. And you're wasting your time. All our time.

这起得了半点作用吗？他就个疯子，只会白费工夫。你这浪费大家的时间。

“There's just no point talking to a Petrified person, ” she said, and they had to admit she had a point when they'd taken their seats next to Hermione.

“跟一个被石化的人谈话，完全白费工夫。”她说。当他在赫敏床边的褥子上落座后，不得不承认庞弗雷夫人说得对。

It wasn't your fault, I bet you just walked past when she was turning on the old charm for Diggory and got a blast of it-but she was wasting her time.

这不你的错，敢说她当时正在对迪戈里施那个魔法，你正巧经过，就被击中了——不过她这次白费工夫了。

The offal fad competed with one for molecular gastronomy, with its spheres of olive juice, then gave way to farm-to-table cooking, which painstakingly detailed the provenance of every radish in a salad.

这股动物内脏潮与流行的分子料理（用橄榄汁做出小球）展开了竞争，随后又位于“农场直达餐桌”菜肴，这类菜肴会煞费工夫地详细说明沙拉中每一个萝卜的来源。