Library science
n. 图书馆（管理）学
🧩 词语组成解析
🗣️ 情景例句
What you're saying is, in order for this center to succeed,
你刚才所说的意思是为了使中心能成功，
How often do you go swimming?
你多久去游一次泳？
He has quite a few friends.
他有不少的朋友。