sealed

中英词典：sealed

形容词：

1. 封闭的；密封的

2. 密封的；封锁的

3. 密封的；不透气的

4. 密封的；保密的

5. 封存的；保密的

6. 封闭的；隐蔽的

名词：

1. 密封物；封条

2. 密封件；密封装置

3. 密封物；封闭物

4. 密封条件；密闭环境

5. 密封（状态）

词语辨析：

"sealed"和"closed"的区别：

"sealed"强调完全密封，不透气，不可打开；而"closed"则指关闭，但不一定完全密封。

词汇扩充：

1. seal up：封住，密封

2. hermetically sealed：密封的，不透气的

3. airtight：密封的，不透气的

4. watertight：防水的，不透水的

5. sealant：密封剂

6. seal off：封锁，隔离

近义词：

1. closed

2. airtight

3. watertight

4. locked

5. shut

反义词：

1. open

2. unsealed

3. unlocked

柯林斯词典解释：

1. 形容词

Something that is sealed is closed so that air, liquid, or dirt cannot get in or out.

2. 过去分词

If an envelope, bag, or parcel is sealed, the edges are stuck together so that nothing can get in or out.

3. 名词

A seal is a piece of paper or plastic that is stuck on to the flap of an envelope or package in order to close it.

牛津词典解释：

1. 形容词

Closed or fastened in such a way as to be airtight or watertight.

2. 过去分词

Closed or fastened with an adhesive substance, typically gummed paper.

3. 名词

A piece of wax, lead, or other material with an individual design stamped into it, attached to a document as a guarantee of authenticity.

用法：

1. sealed in

The meat is sealed in a plastic bag.

2. sealed off

The area has been sealed off by the police.

3. sealed envelope

He handed me a sealed envelope.

4. airtight seal

Make sure the container has an airtight seal.

5. sealed bid

The company submitted a sealed bid for the project.

6. sealed container

Store the food in a sealed container.

7. sealed package

The courier delivered a sealed package.

中英双语例句：

1. The documents were sealed in an envelope.
   文件被封存在信封里。
2. The bottle is sealed with a cork.
   瓶子用软木塞密封。
3. The room was sealed to prevent any leaks of gas.
   为了防止气体泄漏，房间被密封起来。
4. The police sealed off the area around the crime scene.
   警方封锁了犯罪现场周围地区。
5. She carefully sealed the envelope and sent it off.
   她小心地封好信封并寄出去了。
6. A sealed container is necessary to keep the food fresh.
   要保持食物新鲜，需要一个密封容器。
7. The document is confidential and must remain sealed.
   这份文件是机密的，必须保持封存。
8. He broke the seal and opened the package.
   他打开封条并拆开包裹。
9. The letter was sent by sealed mail.
   这封信是通过封发邮件寄出的。
10. I found a sealed box in the attic.
    我在阁楼上发现了一个封闭的盒子。
11. The pipes are sealed to prevent leaks.
    为了防止泄漏，管道被密封了。
12. Please make sure the doors and windows are sealed tightly.
    请确保门窗紧密封闭。
13. The sealed bag contains the evidence from the crime scene.
    密封袋里装着来自犯罪现场的证据。
14. They sealed the deal with a handshake.
    他们以握手来达成协议。
15. The sealed bid will be opened at a later date.
    密封投标将在以后的日期公开。
16. She broke the seal and read the letter.
    她打破封条，读了这封信。
17. The sealed document cannot be accessed without authorization.
    未经授权，无法查阅被封存的文件。
18. The package was sealed with adhesive tape.
    包裹用胶带粘封起来了。
19. The envelope was sealed with a lick of glue.
    信封被一层胶水密封。
20. The box was sealed to protect its contents.
    为了保护里面的物品，盒子被封好。
21. He carefully sealed the letter and handed it over.
    他小心地封好信封并递给了对方。