blood brother;whole brother;brother-german;full brother ;
例句:
Keith and I, we were so close, like brothers.
肯思和我,我们是这么亲密,就象亲兄弟。
Live together like brothers and do business like strangers.
生活相处要像亲兄弟,做起生意要像陌生人。
Good friends are just like brothers who can make you feel warm!
好的朋友犹如亲兄弟,让人备感温暖。