When you want to finish a letter or a book you roll up the scroll and then you put a wax seal at the end of the roll and that seals the book.

当你看完一封信或一本书时，就将书卷卷起，然后在末端用蜡封印，将书封起来。

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Developed nations are under intense pressure to agree to deep 2020 cuts in greenhouse gas emissions to try to seal an agreement at the end of this year that will replace the Kyoto Protocol.

想要在年底达成替代京都议定书的协议，发达国家在减排目标上面临巨大的压力，他们需要同意提高到2020年的减排额度。

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At the end of the paper, a new type of excellent seal for oil-gas spring is introduced.

最后介绍了一种性能优良的油气弹簧密封。

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Gary Hooper came off the bench to seal Celtic's victory, finishing well at the end of a one-two with Georgios Samaras eight minutes from the end.

BBC: europe

But the youngster showed great nerve to tie the set before playing a superb final shot at the end of the second set to seal a stunning win.

BBC: Teenager Jarred Breen makes World Indoor Bowls history

Inspired by the brilliance of Tevez, he has been able to piece together a superb end of season run, capped with a win at champions Manchester United to seal an unlikely escape.

BBC: Tevez delivers final twist