Flyash
粉煤灰
🗣️ 情景例句
Exploring outer space is a challenge to mankind.
探索外层空间是一项向人类发出的挑战。
We've got to get a telepnone stand for the hallway.
我们必须有一部电话放在走廊。
Sweden has evolved an excellent system for protecting the individual citizen from highhanded or incompetent public officers.
在瑞典，已逐渐形成了一种完善的制度以保护每个公民不受专横的和不称职的政府官员的欺压。