Nondiscolouring
不变色
🗣️ 情景例句
I feel that too many people worry about how they look.
我感觉太多的人关注他们的外表。
What's on Channel 8 now?
现在8频道播什么节目？
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。