1·I'm tired of licking envelopes.
我舔信封都舔烦了。
—— 《牛津词典》
2·They took sheets of paper off piles, collated them and put them into envelopes.
他们从纸堆中拿出一沓一沓的纸,整理好并放入信封中。
—— 《柯林斯英汉双解大词典》
3·He glued many envelopes yesterday.
他昨天用胶粘了很多信封。
4·Please give me some envelopes.
请给我一些信封。
5·She often reuses old envelopes.
她经常重复使用旧信封。