Concaves
(concave 的復數) a. 凹的\\n[醫] 凹的, 凹面的
??? 情景例句
That's right. What should we do when we find a shortage in the shipment?
這很對。要是我們發現貨物短缺，該怎么辦？
I am bored to death.
我無聊死了。
I would like to ask you about some stamps.
我想問問有關一些郵票的事。