Volcanicity
n. [地]火山性, 火山现象, 火山活动
🗣️ 情景例句
What are you working on?
你在干什么？
The lovers are watching the sailing boat.
情侣们在眺望着帆船。
it would be up and down, to and for and from side to side.
呈现出上上下下、来来回回、左左右右3种性质的运动。