Concaves
(concave 的复数) a. 凹的\\n[医] 凹的, 凹面的
🗣️ 情景例句
You do?
真的？
To hit the doggie
打狗
for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。