中文翻译与英英解释

n.
1.信封；纸袋；包封，封皮。
2.壳层，外壳。
3.【数学】包(络)线；包迹。
4.【航空】气囊；【天文学】包层；【生物学】包膜，包被。
短语和例子
floral envelope 【植物；植物学】花被。 push [stretch] the envelope逼人太甚。

any wrapper or covering

a flat (usually rectangular) container for a letter, thin package, etc.

the bag containing the gas in a balloon
同义词：gasbag,

the maximum operating capability of a system (especially an aircraft); "test pilots try to push the envelope"

a natural covering (as by a fluid); "the spacecraft detected an envelope of gas around the comet"

a curve that is tangent to each of a family of curves

An envelope is a common packaging item, usually made of thin flat material. It is designed to contain a flat object, such as a letter or card.

例句与用法

The nucleoplasm is surrounded by the nuclear envelope .
核质被核膜包裹。

Please put it in the envelope with your letter .
请你把它和信一起放信封。

Fold the letter and put it in an envelope .
将信折好放进信封。

Do n't forget to stick a stamp on the envelope ..
不要忘记在信封上贴邮票。

This envelope gradually peters out with altitude .
这一包层随高度而逐渐稀薄。

Lady : i want some envelopes please .
女士：我想买些信封。

He knew it was a bank envelope .
他知道这是个银行的封袋。

The surface of the sun is a glowing gas envelope .
太阳的表面是一层炽热的气体层。

Mrnas could cross the chloroplast envelope in vivo .
在体内mRNA能穿过叶绿体外膜。

Feliks saw the crest on the back of the envelope .
费利克斯看了看信封背面的顶饰。