Once you've broken the seal of a bottle there's no way you can put it back together again.

一旦你撕开瓶子的封口,就没法将它重新合上。

《柯林斯英汉双解大词典》

It was sort of a seal of approval.

这也算是一种印证。

youdao

Equal membership in a club of nations was a seal of sovereignty.

在国家俱乐部中，平等的成员国关系如同一个主权印章。

youdao

But knowing what percentage this is of the total amount leaking from the well will not be possible until a tight seal is on the well.

VOA: standard.2010.06.14

Is that how important is it that we get control of that border and seal it, so to speak.

对于我们来说,控制或者是夺取这个关口，是不是很重要呢。

普林斯顿公开课 - 国际座谈会课程节选

You can see them like all of the teenage type stores like "Forever 21", "Wet Seal",

在青少年专卖店里，比如说 "Forever 21"，“Wet Seal” 等，到处都能看到这种东西，

推荐购物街 - SpeakingMax英语口语达人

And let patients decide, when they buy pills, whose seal of approval they want.

FORBES: The Privatized Policeman

She called the New York City Department of Education and won its seal of approval.

FORBES: Charity--For a Profit

And, as he told the BBC, his work now has an official seal of approval.

BBC: Swedish Fredrik Saker paints driving licence picture