Library structure
[计] 库结构
🧩 词语组成解析
🗣️ 情景例句
Are you experienced in office management?
你在企业管理上有经验吗？
Which one is Mr. Jame's office?
哪间是詹姆司先生的办公室？
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。