Polychaeta
[医] 多毛类(动)
🗣️ 情景例句
I have approximately three-year experience using a computer.
我有大约三年操作电脑的经验。
How will we know whether it can have a positive effect on the company?
我们怎么会知道它对公司能有积极的效果呢？
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。