Development specification
[计] 开发说明, 开发描述
🧩 词语组成解析
🗣️ 情景例句
He's something!
他真了不起！
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
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。