Tribolite
矿物磨料
🗣️ 情景例句
Help me get this stuff out of the car.
帮我将这些东西拿下车子。
The doctor discovered that I'm a little overweight.
医生发现我有点超重。
In the pioneering days, however, this was not the case at all.
然而，在登山运动的初期，全然不是这种情况。