Concavoconcave
[医] 对凹的, 双凹的
🗣️ 情景例句
There are several tours of the Grand Canyon.
到大峡谷有好几个旅游团。
He is proud of his achievement.
他为自己取得的成就感到骄傲。
You are just saying that.
你只是说说而已。