苦功

yǔ yán zhè dōng xi bù shì suí biàn kě yǐ xué hǎo de fēi děi xià kǔ gōng bù kě

语言这东西不是随便可以学好的，非得下苦功不可。

The mastery of language is no easy and requires painstaking effort.

xià kǔ gōng gōng zuò

下苦功工作

work hard

yòng le bù shǎo kǔ gōng

用了不少苦功

put in a lot of hard work

nà děi xià kǔ gōng

那得下苦功。

That requires hard work.

xué hǎo yī mén jì shù bù róng yì fēi xià kǔ gōng bù kě

学好一门技术不容易，非下苦功不可。

The mastery of a technique is not easy and requires painstaking efforts.

tā xià kǔ gōng xué xí huà xué huò dé le gāo fēn

他下苦功学习化学，获得了高分。

He took great pains with his chemistry lessons and got high marks.

wén zhāng yào xiě de qīng tōng bì xū xià yī fān kǔ gōng

文章要写得清通，必须下一番苦功。

If you want to write a clear and coherent essay, you have to work hard on it.

yào zhī dào zhěng fēng zhǔ yào kào zì jǐ xià kǔ gōng

要知道整风主要靠自己下苦功。

One should understand that rectification requires one's own painstaking effort.