Prelimer
石灰混合器
🗣️ 情景例句
We can learn a lot by asking.
我们到处问问会学到不少东西。
Finally,I asked him how old he was.
最后,我问他他多大。
If explosives are used, vibrations will cause the roof of the mine to collapse.
如果用炸药爆破，震动会引起矿顶塌落。