援

防化救援

fáng huà jiù yuán

antichemical rescue

阻援

zǔ yuán

to block reinforcements

驰援

chí yuán

to rush to the rescue

人道救援

rén dào jiù yuán

humanitarian aid

备援

bèi yuán

backup (Tw)

围城打援

wéi chéng dǎ yuán

to besiege and strike the relief force (idiom); strategy of surrounding a unit to entice the enemy to reinforce, then striking the new troops

增援

zēng yuán

to reinforce

外援

wài yuán

foreign aid

奥援

ào yuán

hidden ally

孤立无援

gū lì wú yuán

isolated and without help

弹尽援绝

dàn jìn yuán jué

out of ammunition and no hope of reinforcements (idiom); in desperate straits

后援

hòu yuán

reinforcement