Conca
康卡構造, 貝殼狀塌陷（構造）； 火口區同心狀凹陷
??? 情景例句
We'll go together.
我們一起去。
A liar is worse than a thief.
撒謊比偷竊更可惡。
The third person who lit a match started the fire.
第三個工人擦亮一根火柴就引發了火災。