费功夫

bù yòng wèi wǒ fèi gōng fu

不用为我费功夫！

Don't go to any trouble for my benefit!

shè jì yī gè wǎng zhàn kě néng hěn fèi gōng fu

设计一个网站可能很费功夫。

Designing a website may need a lot of work.