Before posting a letter, you should enclose it in an envelope.

He stuck down the envelope and dropped it into the mailbox.

他把信封粘好后便投进邮筒.

He ripped open the envelope and read what was inside.

他撕开信封,看了里面的信.

A key was enclosed in the envelope.

信封中装有一把钥匙.

She folded up her letter, licking the envelope flap with relish.

她把信折好，用力舔了舔信封的折口。

This old stamp isn't sticky any more; I shall have to gum it down onto the envelope.

这张旧邮票的背面没黏性了, 我得用胶把它粘在信封上.

She opened the perfumed envelope.

她打开了带有香味的信封。

All the people present were enveloped in an atmosphere of joy.

所有在场的人都沉浸在欢乐的气氛中.

Smoke from the burning room enveloped the whole building.

着火了的那个房间冒出的烟遮蔽了整个大楼.

They are regarded as being enveloped in regenerated gneisses.

它们被认为包围在再生的片麻岩之中.

The distant hills were enveloped in clouds and mist.

远山被云雾遮掩着.

That lovely, rich fragrant smell of the forest enveloped us.

森林里那种馥郁芬芳的迷人气味围绕着我们。

His past was enveloped in a shroud of mystery.

他的过去被裹上一层神秘色彩.

She was enveloped in a huge white towel.

她裹在一条白色大毛巾里。

The river appeared as if enveloped in smog.

那条河好像笼罩在烟雾之中.

Her tone and her look still enveloped her in a soft inaccessibility.

她的语调和神态依旧把她禁锢在一种不可接近的状态中.

writing paper and envelopes

信纸和信封

The areas under the two resonance envelopes are unequal.

两个共振峰下面的面积是不相等的.

Do you sell stamps ( envelopes )?

你们出售邮票 ( 信封 ) 吗 ?

We've gone through all those envelopes I bought last week.

我们用完了我上周买的所有的信封.

Please reuse your envelopes.

信封请重复利用。