Flyash
粉煤灰
🗣️ 情景例句
Big jobs--factories, shopping malls.
大的工程 ，工厂 ，大型购物中心。
A discontented man knows not where to sit easy.
不满足者坐无宁时。
John works very hard. He goes to work early.
约翰工作很努力。他早早上班。