他拆开信封，抽出信来。

He slit open the envelope and took out the letter.

我在信封上写了“请转递”。

I put 'please forward' on the envelope.

请附姓名地址邮资俱全的信封，以便把化验结果寄给你。

Please enclose a stamped addressed envelope to get your test results.

一定要在支票上签了名再封信封。

Make sure you've signed the cheque before sealing the envelope.

旅馆的名字凸印在信笺和信封上。

The hotel's name was embossed on the stationery.

请附姓名地址邮资俱全的信封，以便邮递化验结果。

Please enclose an sae for your test results.

从信封的透明窗必须能够看清楚地址。

The address must be clearly visible through the window of the envelope.

信封是用胶黏带封口的。

The envelope was stuck down with Sellotape.

我舔信封都舔烦了。

I'm tired of licking envelopes.

别封上信封。

Leave the envelope open.

信封请重复利用。

Please reuse your envelopes.

请记得写信时在信封里放一个贴好邮票、写明地址的信封。

Please remember to enclose a stamped addressed envelope when writing.