Obstetrically
adv. obstetrical的变形
🗣️ 情景例句
How could I forget?
我怎么会忘呢？
John stopped studying.
约翰停止学业了。
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。