Concavoconcave
[医] 对凹的, 双凹的
🗣️ 情景例句
Because the United States is the most important trade partner.
因为美国是我们最重要的贸易伙伴。
She is skilled at using computer.
她能熟练使用计算机。
Perhaps it will solve my problem, but I just haven't had time to read it!
也许这本书能解决我的问题，但我一直还没时间去看这本书！