反咬一口

yī yǒu ruò shì tā men jiù huì fǎn yǎo yī kǒu

一有弱势，他们就会反咬一口。

They will turn on us at the first sign of weakness.

cóng lì shǐ shang kàn měi guó bāng zhù de guó jiā wǎng wǎng zài zuì hòu fǎn yǎo yī kǒu

从历史上看，美国帮助的国家往往在最后反咬一口。

History shows that the assistance the America giving to any of these countries ends up backfiring in everyone's face.