envelope
A strong, buff-colored envelope, typically large.
写好回信地址的信封
An envelope with your own address on it, for someone to send you a reply.
信封上写有自己的地址，以便他人寄回回复。
贴好邮票并写好地址的回邮信封
A self-addressed envelope that also has a stamp on it.
一个已经贴上邮票并写好自己地址的信封。
回邮信封
An envelope for sending something back to the original sender.
用于将物品寄回给原始发件人的信封。
A lightweight envelope for sending letters overseas by air.
邮资已付的信封
An envelope where the postage has already been paid by the sender.
一种已经支付了邮费的信封。
回邮信封
An envelope for a reply, with postage already paid.
一种通常随信件附上的信封，其回复邮资已由寄件人支付。
An envelope that is large and difficult to handle because it's full.
在信封背面
Used to refer to a surface for making quick, informal calculations or notes.
用来指一个可以快速进行非正式计算或笔记的表面。
在信封上
Used to describe something written on the surface of an envelope.
用于描述写在信封表面的东西。
（放）进信封里
Used with verbs of motion, like 'put' or 'stuff'.
与表示动作的动词一起使用，如 'put' 或 'stuff'。
一信封的...
Indicates the contents, often used with plural nouns (e.g., an envelope of cash).
表示内容物，常与复数名词连用（例如，一信封的现金）。
在信封上写地址
To write the recipient's name and address on an envelope.
在信封上写上收件人的姓名和地址。
用刀划开信封
To open an envelope neatly with a sharp tool like a letter opener.
用像开信刀这样的锋利工具整齐地打开信封。
在信封上做标记
To write a special instruction (e.g., 'Personal') on an envelope.
在信封上写上特殊指示（例如，“亲启”）。
用蒸汽熏开信封
To open a sealed envelope secretly using steam to loosen the glue.
用蒸汽软化胶水来秘密地打开一个密封的信封。