ONE PHRASE, IN CONTEXT
be in the middle of
正在……过程中；处于……中间
GET TO KNOW THE MEANING
读懂它，也学会这样说。
01正在……过程中；处于……中间
IN A SENTENCE
The librarians were in the middle of moving the history collection when the delivery truck arrived.
送货卡车到达时，图书管理员正在搬运历史类藏书。