Sayer
n. 说话的人
🗣️ 情景例句
You did a good job.
你做得真棒！
You like to play with me, don't you?
你就这么爱耍我是吗？
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。