Envelops
n. 包络线；信封（envelop的复数）
🗣️ 情景例句
I want our children to learn
我要孩子们学习到
Lily is a Sophomore now.
莉莉现在大学二年级。
Fishermen and sailors sometimes claim to have seen monsters in the sea.
渔夫和水手们有时声称自己看到过海里的妖怪。