Lignans
木脂素类
🗣️ 情景例句
How much money are you looking for in this job?
你希望的薪水是多少？
Little pigeons can carry great messages.
少年也可以成大事。
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。