Rtm
abbr. 運轉計時器（Running Time Meter）
??? 情景例句
I heard the professor of that class is very good.
我聽說那個班的教授很好。
How much does she eat?
她要吃多少？
Excuse me, Miss Yang. I've just found this library book.
“打攪了，楊小姐。我剛剛撿到這本圖書館的藏書。”