Cbat
abbr. Central Bureau of Astronomical Telegrams 中央天文电报管理局
🗣️ 情景例句
and I promise you I won't forget.
我向你保证， 我不会忘的。
You'd better wear a light jacket.It's chilly today.
你今天最好穿一件浅色的夹克衫。 今天很冷。
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。