Concavation
凹度
🗣️ 情景例句
Where will we put all the presents?
我们把这些礼物放在哪里？
In fifty years there'll be twenty people per square yard, it is written here.
这里写着，再过五十年每平方码将要住着20人的人口密度。
The old lady though the was a fussy creature,
老妇人觉得巡官大惊小怪，