留发票的英文：
to keep the bill

keep是什么意思：
v. 保持，处于；继续，重复；使耽搁；抚养；履行
n. 生活费，生活必需品

That news will keep.
那个消息留待以后再宣布。

They keep a shop.
他们经营一家商店。

How are you keeping?
你最近还好吧？

Will this food keep?
这食品能放得住吗？

To keep high quality of products is to keep the everlasting value.
保持产品的高质量，就是保持永恒的价值。

bill是什么意思：
n. 帐单；广告；法案；钞票；清单
v. 宣布；用海报宣传；开账单

bill of indictment
刑事起诉书

The bill was negatived.
这议案遭到了否决。

It does not operate as a negotiation of the bill.
它不能作为汇票流通转让。

Here is a 5 yuan bill.
这是一张5元纸币。

Bill at no time gambles.
比尔从不赌博。