万事俱备，只欠东风（萬事俱備，只欠東風）　

◎ 万事俱备，只欠东风 wàn shì jù bèi,zhǐ qiàn dōngfēng

[everything is ready,and all that we need is an east wind;all is ready except what is crucial] 指三国时周瑜火攻曹营,一切都准备就绪,只欠东风尚未刮起,不能放火。比喻办事的其它条件均已成熟,唯一还少一条就能成功