Mamillation
乳头形成
🗣️ 情景例句
Do I know you?
我认识你吗？
Out of debt,out of danger.
脱债就脱险。
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。