Concavation
凹度
🗣️ 情景例句
Marilyn and Richard and the baby need the space.
Marilyn和Richard还有婴儿需要空间。
They cannot help but be grieved by the death of a friend.
眼见朋友死亡，自己却无能为力，他们感到深深的悲哀。
We waited and waited, but nothing happened.
我们等啊等啊，可情况没有变化。