double-cross someone (dà bù kè sī shénme rén)

Idiom Trust

含义

to betray someone after pretending to support them

在假装支持某人后背叛某人 (zài jiǎzhuāng zhīchí mǒu rén hòu bèipàn mǒu rén)

例句

"He promised to help but double-crossed me in the end."

"他答应帮忙,但最后背叛了我。" (Tā dāyìng bāngmáng, dàn zuìhòu bèipànle wǒ)