Mussorgsky
[電影]穆索爾斯基
??? 情景例句
I hope it isn't important.
希望不是什么重要事。
He's behind the times.
他跟不上時(shí)代了。
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(huán)，用這種方法來控制壓力。