Deltoiditis
三角肌炎
??? 情景例句
Let's go for lunch. I'm buying.
去吃午飯吧， 我請客。
I really should be on my way.
我真的該告辭了。
and we control it by means of the mud which we circulate down the drill pipe.
我們讓泥漿順著鉆桿向下循環，用這種方法來控制壓力。