Background count
[医] 本底计数
🧩 词语组成解析
🗣️ 情景例句
You're in sad condition.
你的健康很成问题。
No man is a hero to his valet.
仆从目中无英雄。
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。