封闭的英文：
close
seal

参考例句：

Occluding or tending to occlude.
封闭的封闭的或倾向于封闭的

Shut in;enclosed.
封闭的;包围的

Road closed
道路封闭

Trigeminal nerve block
三叉神经封闭术

The peritoneal cavity is a closed sac.
腹膜腔是一个封闭的囊腔。

The peritoneal cavity is a closed sac
腹膜腔是一个封闭的囊腔。

A cylinder is a hollow tube with a closed concave base that permits it to stand upright.
钢瓶是中空的管道，封闭的底部是凹入的，这样可以直立起来。

A closed unidirectional signal path connecting input / output devices to a system.
连接输入输出设备到系统的一种单向封闭的信号通路。

A measure of the disorder or randomness in a closed system.
随机计量单位在封闭体系中对无序和随机的计量单位。

One expressway lane was closed because of a bad smash near the exit.
高速公路的一个单向行车线被封闭了，因为出口附近发生了一次严重的撞车事故。

close是什么意思：
v. 关闭；封闭；结束，结清；使靠拢，使愈合
adj. 接近的；亲密的；紧密的；严密的；不透气的；势均力敌的
adv. 接近；紧密地
n. 结束；终止

close unchanged
收盘时股价

Wright was close.
怀特是个吝啬的人。

The wound has closed.
伤口已愈合。

They are close in age.
他们年龄相仿。

to draw close; to close up; to shorten the distance
靠拢

seal是什么意思：
n. 海豹；图案，印章；封印；保证，誓约；标志，象征
v. 保证；密封；确定；盖章；密封

A stamp or seal meant to be impressed.
图章用来盖戳的图章或印章

The experience seals their friendship.
这一经历确定了他们的友谊。

Sealing is prohibited in many countries.
许多国家禁止捕海豹。

The probe unit is hermetically sealed.
探头装置是密封的。

It was stored in a tube with a break seal.
它保存在一个有断裂密封垫的试管里。