Meaning of yǐ zhì yú:
yǐ zhì yú
以至于
Conjunction
down to; up to; to the extent that...
Tā tài jīdòng le, yǐ zhì yú shuō bù chū huà lái.
他太激动了，以至于说不出话来。
He was so excited that he couldn't speak.
Tā gōngzuò hěn nǔlì, yǐ zhì yú shēntǐ dōu chī bùxiāo le.
他工作很努力，以至于身体都吃不消了。
He worked so hard, up to the point that his body couldn't take it anymore.
Tā fēicháng máng, yǐ zhì yú méiyǒu shíjiān chī wǔfàn.
他非常忙，以至于没有时间吃午饭。
He is so busy that he doesn't even have time to eat lunch.
