没用
méi yòng
useless
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这本书没有用
Zhè běn shū méiyǒu yòng
This book is not useful
我不用
wǒ bù yòng
I do not need
没有，没什么
méiyǒu， méishénme
No, nothing.
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
汽车很有用
Qìchē hěn yǒuyòng
Cars are 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.