Changefulness
不确定性
🗣️ 情景例句
There is no one here by that name.
这里没有玲玲这个人。
The leopard can never change its spots.
花豹永不能改变身上的斑点（指：本性难移）。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，