用功
yòng gōng
diligent, industrious (in one's studies), to study hard, to make great effort
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我用工具修理自行车。
wǒ yòng gōng jù xiū lǐ zì xíng chē。
I use tools to repair bicycles.
她用了很长时间找到了工作。
tā yòng le hěn cháng shí jiān zhǎo dào le gōng zuò。
It took her a long time to find a job.
我不用
wǒ bù yòng
I do not need
这本书没有用
Zhè běn shū méiyǒu yòng
This book is not useful
网站很好用
wǎng zhàn hěn hǎo yòng
The website is very useful
电池用完了。
diàn chí yòng wán le。
The battery is dead.
我是工厂的职工
wǒ shì gōng chǎng de zhí gōng
I am a factory worker.
学科技很有用
xué kē jì hěn yǒu yòng
Learning technology is very useful.
你的包真实用！
nǐ de bāo zhēn shí yòng！
Your bag really practical!
这是农业用的
zhè shì nóng yè yòng de
This is for agricultural use.