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TOEFL IELTS BNC: 4259 COCA: 4021

seal noun [ C ] ANIMAL

B2 a large mammal that eats fish and lives partly in the sea and partly on land or ice海豹

Examples

a seal pup

The plan to cull large numbers of baby seals has angered environmental groups.

We could see seals on the rocks, basking in the sun.

We spied a seal from the shore.

We sailed past a group of seals.

seal noun [ C ] COVERING

something fixed around the edge of an opening to prevent liquid or gas flowing through it密封垫;密封装置

Clean the seal on/around the fridge door regularly so that it remains airtight.定期清洁冰箱门上的密封条,可以使它保持密闭。

a thin piece of material such as paper or plastic that covers the opening of a container and has to be broken in order to open the container and use the contents封口

seal noun [ C ] MARK

an official mark on a document, sometimes made with wax, that shows that it is legal or has been officially approved封蜡;印章;封条

The lawyer stamped the certificate with her seal.律师在证书上盖上了她的印章。

seal verb [ T ] COVERING

C2 to close an entrance or container so that nothing can enter or leave it封,密封

to cover a surface with a special liquid to protect it(用特殊液体)封盖…的表面

This floor has just been sealed (with varnish), so don't walk on it!地板刚刚上过清漆,别在上面走!

C2 to close a letter or parcel by sticking the edges together封上(信或包裹)

Seal the package (up) with tape.用透明胶带把包裹封起来。
He sealed (down) the envelope and put a stamp on it.他封上信封,贴上邮票。

More examples

The top of the bottle is then sealed with green wax.

To ensure that the bottles of ink are not tampered with, the lids will be sealed with plastic.

Make sure that any gaps around the edge of the bath are sealed.

Seal the bags before they go in the freezer.

Food sealed in foil pouches lasts for a long time.

seal verb [ T ] MARK

to make an agreement more certain or to approve it formally确认,正式批准(协议)

The two leaders sealed their agreement with a handshake.两位领导人握手表示达成协议。

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