随
suí
to follow, to comply with, varying according to..., to allow, subsequently
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大家随便吃
dà jiā suí biàn chī
Everyone freely eat.
不要随便拿东西
bù yào suí biàn ná dōng xi
Don't casually take things.
别随便动我的手机
bié suí biàn dòng wǒ de shǒu jī
Don't casually/randomly touch my cellphone.
别随便进我的办公室
bié suí biàn jìn wǒ de bàn gōng shì
Don't randomly enter my office.
做事要随机应变，根据变化情况做出调整。
zuò shì yào suí jī yìng biàn， gēn jù biàn huà qíng kuàng zuò chū tiáo zhěng。
Be flexible and adapt to changing situations.