envelope meaning in English
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
Examples
- 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。