Steeleite
反沸石
🗣️ 情景例句
we are gathered here today
我们今天聚集在这，
He's concentrating on learning English.
他集中精力学英语。
It sped downhill at the end of the race and its driver had a lot of trouble trying to stop it.
它在接近终点时，冲下了山坡，驾驶员费了好大劲才把车停下来。