变

亘古不变

gèn gǔ bù biàn

unchanging since times immemorial (idiom)

通权达变

tōng quán dá biàn

to adapt to circumstances

造父变星

zào fù biàn xīng

(astronomy) Cepheid variable star

变坏

biàn huài

to get worse

连续变调

lián xù biàn diào

tone sandhi

量变

liàng biàn

quantitative change

错义突变

cuò yì tū biàn

missense mutation

链式裂变反应

liàn shì liè biàn fǎn yìng

chain reaction of nuclear fission

阻抗变换器

zǔ kàng biàn huàn qì

impedance converter

陡变

dǒu biàn

to change precipitously

陈桥兵变

chén qiáo bīng biàn

the military revolt of 960 that led Zhao Kuangyin 趙匡胤|赵匡胤 to found the Song dynasty

随机应变

suí jī yìng biàn

to change according to the situation (idiom); pragmatic