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backendn.后端adj.后端的

1. Back again already?
   已经又回来了?
2. Hello, it's us back again!
   喂，是我们回来了！
3. You'll never get the money back again.
   那笔钱你再也弄不回来了。
4. Don't you dare come back again!
   你敢再回来！