退步
tuì bù
to do less well than before, to make a concession, setback, backward step, leeway, room to maneuver, fallback
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不行，不能进来
bù xíng， bù néng jìn lái
You can't come in here!
不好意思，我不知道。
bù hǎo yì si， wǒ bù zhī dào。
Sorry, I do not know.
我不用
wǒ bù yòng
I do not need
不能说
bù néng shuō
Can not say
不能走
bù néng zǒu
Can't go
不能做
bù néng zuò
Can not do
天气不好
tiān qì bù hǎo
Bad weather
不要运行
bù yào yùn xíng
Don't run
他不喝绿茶
Tā bù hē lǜchá
He does not drink green tea
他不喜欢书
Tā bù xǐhuān shū
He does not like books