envelopes
n. 信封（envelope 的复数）
例句
I'm tired of licking envelopes.
我舔信封都舔烦了。
《牛津词典》
She had 500 leaflets to stuff into envelopes.
她得把500份传单装进信封里。
Catherine put all the envelopes aside unopened.
凯瑟琳把所有信封都放了进去，一个也没打开。
《柯林斯英汉双解大词典》
