Cogbell
冰柱, 垂冰
🗣️ 情景例句
What's the problem?
什么事？
The greatest obstacle to progress is prejudice.
进步的最大障碍是偏见。
Oxygen is widely used in ship repairs for cutting and joining metal plates or pipes.
在船舶修理过程中，常常使用氧气切割和焊接金属板或金属管。