Boghead (coal)
[化] 烟煤
🧩 词语组成解析
[机] 烟煤
🗣️ 情景例句
Just give me your name and the place where you are calling from?
请给我您的姓名与地点所在。
Skiing is such a difficult sport that it's more work than play.
滑雪是非常困难的运动，真所谓工作高于游戏呀。
and we control it by means of the mud which we circulate down the drill pipe.
我们让泥浆顺着钻杆向下循环，用这种方法来控制压力。