Polysinusitis
多窦炎
🗣️ 情景例句
Are all these goods made in your factory?
所有这些货物都是贵厂生产的吗？
Is that so?
是这样子的吗？
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。