交还的英文：
to return something
to hand back

参考例句：

The rest he remitted to the friends of the slain
他将其它一切都交还死者的朋友。

Please leave your keys at reception on departure
离开时,请将钥匙交还接待处

When the lease term expires, Party B will return the premises and attached facilities to Party A within days.
租赁期满后，乙方应在日内将房屋交还甲方

The waiter handed Miss Sun the parasol, which was now steaming hot as well as dripping wet
茶房把伞交还孙小姐，湿漉漉加了热气腾腾。

You check out with a full tank and return in full.
你先检查油箱是满的，交还时油箱也要满的。

return是什么意思：
v. 带回，放回，恢复，回到
n. 回来，归还，回报
adj. （票）双程的，往返的；（旅途）返回的，返程的

The return of a prodigal
回头浪子

Return ReceiptsSettings for requesting or returning receipts
返回收据有关收据的请求或返回有关的设置

To return disappointedly; defeated.
铩羽而归

something是什么意思：
pron. 某物；某事
n. 重要的人（或事物）；大致

It is not something ephemeral.
它不是朝生暮死的东西。

Know something of everything and everything of something
既要有一般常识,又要有专业知识

Know something of everything and everything of something.
通百艺而专一长。

back是什么意思：
n. 后面，背面，反面；背，背部；靠背；后卫
v. 支持；后退，倒退；背书；下赌注于
adj. 背部的；后面的；过去的；拖欠的.
adv. 以前；向后地；来回地；上溯

Stand back to back!
背靠背站好！

They are on the back of the menu.
它们在菜单背面。

Our seats on the train were back to back.
我们在火车上的坐位是背靠背的。