音标：['envәlәup] ；柯林斯词典等级：2 级；牛津三千核心词汇；

n. 信封, 封套, 封袋
[医] 膜, 包袋

n. a flat (usually rectangular) container for a letter, thin package, etc.
n. any wrapper or covering
n. a curve that is tangent to each of a family of curves
n. a natural covering (as by a fluid)

词型变化：名词复数形式 : envelopes
考试类型：[高考/四级/六级/考研]

词性分布：

名词100%

envelope的用法和样例：

例句

用作名词(n.)

There are several enclosures in the envelope.信封内装有几份附件。
I use a prepaid envelope.我用了一个邮资已付的信封。
He glued a stamp onto the envelope.他把邮票贴在信封上。
The surface of the sun is a glowing gas envelope.太阳的表面是一层炽热的气体层。
The papers are enveloped by plastic bag.论文用塑料纸包封好了。

常见句型

用作名词(n.)

The old man was quite surprised to find a ten-yuan note in the envelope.老人十分吃惊地发现信封里装着10元钱。
Write the address on the envelope.请将地址写在信封上。
He glanced at the envelope and recognized his uncle's handwriting.他看了一眼信封,认出那是他叔父的笔迹。
Addressing envelopes all the time is dreary work.老是往信封上写地址是件乏味的工作。
Address an envelope and put the letter in it.把地址写在信封上,把信装进去。
Please write down your name on the reverse side of the envelope.请在信封的背面写下你的名字。
The stamp didn't stick to the envelope.邮票没有在信封上贴牢。
She opened the envelope with reluctance.她极不情愿地打开了信封。
He knew it was a bank envelope.他知道这是一个银行的封袋。

词汇搭配

用作名词 (n.)

动词+～

address an envelope在信封上写地址
fold an envelope将信封折起来
open an envelope拆开信封
stamp the envelope把邮戳印盖在信封上
tear an envelope open把信封撕开

形容词+～

self-addressed envelope写明姓名和地址的回信信封

名词+～

airmail envelope航空信封
pay envelope工资袋
window envelope开窗信封

介词+～

a packet of envelope一叠信封
on the envelope信封上

经典引文

Goodbye, brothers: your mortal envelopes lie here in Mother Earth.
出自：H. Williamson
A 225 grain round nosed bullet with a cupro nickel envelope.
出自：Guns Review

【近义词】

covering覆盖物
packet小袋
cover封面
wrapper(饺子)皮
wrapping包装材料
blanket毛毯
casing套
shell壳
album唱片集
layer层
gasbag气囊

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