Distant indication
[计] 远程指示
🧩 词语组成解析
🗣️ 情景例句
So how has life changed since you left the army?
你离开军队后，生活过得如何？
Do you have a room available?
你们有空房间吗？
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）。