To be thick as thieves (图 比 西克 艾兹 西夫斯)

Idiom Friendship

含义

To be very close friends

成为非常亲密的朋友 (chengwei feichang qinmi de pengyou)

例句

"They've been thick as thieves ever since childhood."

"他们从小就是非常要好的朋友。" (tamen congxiao jiushi feichang yaohao de pengyou)