as closely linked as flesh and blood ❍ 我们两国唇齿相依，～，要团结起来，共御外侮。Our two countries are close as lips and teeth and linked as flesh and blood. We must unite as one to resist foreign aggression.
骨肉相连
as closeiy linked as flesh and blood
骨肉相连ɡǔ ròu xiānɡ lián
象骨头和肉一样连在一起。比喻关系非常亲密。as closely linked as flesh and blood