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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他退休后很忙
tā tuì xiū hòu hěn máng
She has been very busy since her retirement.
你什么时候退休
nǐ shén me shí hou tuì xiū
When will you retire?
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
不能走
bù néng zǒu
Can't go
不能做
bù néng zuò
Can not do
不能说
bù néng shuō
Can not say
部长很忙。
bù zhǎng hěn máng。
The minister is very busy.
不要吵架。
bù yào chǎo jià。
Don't quarrel.