Structure specification
[计] 结构说明, 结构功能描述
🧩 词语组成解析
🗣️ 情景例句
Oh, it's OK.
噢 ，没关系。
It's not too heavy,but I don't know the exact weight.
它不是太重的，但是我不知道准确的重量。
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。