晚安用英语怎么说高级

"Goodnight" is the most commonly used expression for saying "goodnight" in English. It is a contraction of "Good night".
This expression has its roots in the Old English "God nihte" and has been in use for centuries to bid farewell to someone for the evening.
Examples:
"Goodnight, see you tomorrow."
(晚安，明天见。)
"Sweet dreams, goodnight."
(美梦，晚安。)
"Sleep tight, goodnight."
(睡得好，晚安。)