backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的back of在 ... 后部； 在 ... 背部

1. A back dive in which the diver turns in the air so as to face the board before entering the water.
   向内跳水跳水者在入水前在空中面对跳板空翻的向后跳水