Scumming
[机] 起泡沫
🗣️ 情景例句
This has been a hard course for me.
这门课对于我来说很难。
The designer is going to create a new type of dress.
服装设计师正在设计新款女装。
This is done by a great number of ring-shaped air jets on the bottom of the craft.
船底装上大量环状喷气嘴以实现这一目的。