envelope

名词 envelope:

1. a flat rectangular paper container for papers
2. any wrapper or covering
3. a curve that is tangent to each of a family of curves
4. a natural covering (as by a fluid)
5. the maximum operating capability of a system
6. the bag containing the gas in a balloon
   同义词：gasbag

1. Does the name on the envelope correspond with the name on the letter inside?
   信封上的名字与里面信上的名字是否相同?
2. There are several enclosures in the envelope.
   信封内装有几份附件。
3. He steamed the stamp off the envelope.
   他用蒸汽把信封上的邮票揭下来。
4. I use a prepaid envelope.
   我用了一个邮资已付的信封。
5. A paper or thin cardboard envelope for a phonograph record.
   唱片套子留声机唱片的纸套或薄纸板封套
6. He glued a stamp onto the envelope.
   他把邮票贴在信封上。
7. The envelope was firmly sealed.
   这个信封封得很严实。
8. He addressed the envelope before mailing the letter.
   寄信前，他在信封上写上地址。

en.ve.lope

n.（名词）
A flat, folded paper container, especially for a letter.
信封：扁平，装折叠纸的容器，尤其用来装信
Something that envelops; a wrapping.
包裹物；封皮
Biology An enclosing structure or cover, such as a membrane or the outer coat of a virus.
【生物学】 膜，包袋：包裹性的结构或包皮，如膜或病毒的外壳
The bag containing the gas in a balloon or an airship.
气囊：气球或飞艇上容纳气体的袋装物
The set of limitations within which a technological system, especially an aircraft, can perform safely and effectively.
极限数据：技术系统，尤其是飞机，能够安全有效运转的一系列界限
The coma of a comet.
彗星的彗发
Mathematics A curve or surface that is tangent to every one of a family of curves or surfaces.
【数学】 包络线，包络面：一条曲线或一个曲面，与一组曲线或曲面中的每一曲线或曲面保持正切

<习惯用语>push the envelope
To increase the operating capabilities of a technological system.
增强技术系统的运转能力
来源：
French enveloppe
法语 enveloppe
from envelopper [to envelop]
源自 envelopper [包住]
from Old French envoloper * see envelop
源自 古法语 envoloper *参见 envelop