Johnnetta
[人名] 约翰妮塔
🗣️ 情景例句
OK. Do you know when you'll come and visit?
好啊。你知道几时还会再来拜访我们吗？
How did you sign the letter?Did you write, sincerely yours?
你怎么签名信的?你写了"真诚地你的"？
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。