Thm
abbr. 重矿物总量（Total Heavy Minerals）
🗣️ 情景例句
In the home?
在家中？
She is singing in practice.
她在练习唱歌。
It was not long before a helicopter arrived on the scene to rescue the survivors of the plane crash.
不久，一架直升飞机飞抵飞机失事现场，来搭救这几个幸存者。