n.信封，塑料封套，塑料封皮

原形：envelope复数：envelopes

Eric ripped open the envelope and read what was inside.
埃里克撕开信封，看破里面的信。
His parents, when they were younger, used to budget by putting money into envelopes.
他父母年轻的时候，常常把钱放进信封里来进行预算。
Tom glanced at the envelope and recognized his uncle's handwriting.
汤姆看了一眼信封,认出那是他叔父的笔迹。
I need you to put this letter in an envelope before I can mail it.
我需要你在邮寄这封信之前把它装进信封里。
The postman delivered an envelope addressed to me, but it was empty.
邮递员送来了一个写给我的信封，但里面是空的。
She placed a handwritten note inside the sealed envelope for her friend's birthday surprise.
她把一张手写的便条放在密封的信封里，作为朋友生日惊喜。
To ensure privacy, always seal your personal documents in an envelope with a secure closure.
为了保护隐私，一定要用有安全封口的信封装好你的个人文件。
He dropped the envelope into the mailbox, hoping it would reach its destination on time.
他把信封投入邮箱，希望它能准时到达目的地。
The customs officer carefully inspected the international envelope for any prohibited items.
海关官员仔细检查了国际信封，以防有任何违禁物品。
In the old days, people used to send love letters in wax-sealed envelopes to maintain their secrecy.
在过去，人们常常用蜡封的信封装情书以保持其隐秘性。
The envelope was marked "Priority," so it should be delivered faster than regular mail.
信封上标有“优先”字样，所以应该比普通邮件更快送达。
She opened the padded envelope and found a delicate piece of jewelry inside.
她打开加垫的信封，发现里面有一件精致的珠宝。
He tore open the envelope hastily, eager to see the contents of the long-awaited letter.
他迫不及待地撕开信封，急于一睹期待已久的信件内容。