用心
yòng xīn
motive, intention, to be diligent or attentive, careful
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我不用
wǒ bù yòng
I do not need
电池用完了。
diàn chí yòng wán le。
The battery is dead.
网站很好用
wǎng zhàn hěn hǎo yòng
The website is very useful
这本书没有用
Zhè běn shū méiyǒu yòng
This book is not useful
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.
他用的是纯金
tā yòng de shì chún jīn
He used pure gold.
这种电池很耐用。
zhè zhǒng diàn chí hěn nài yòng。
This battery is very durable.
我们要节约用水。
wǒ men yào jié yuē yòng shuǐ。
We must save water.