skin“皮肤”，teeth“牙齿”，“the skin of your teeth”可不是“牙齿上的皮肤”，而是“侥幸成功；勉强做成”。

【例句】
He won the game by the skin of his teeth.
他侥幸赢得比赛。

He escaped from the secret police by the skin of his teeth.
他从秘密警察手里侥幸逃脱。