Concavo-concave
a. 两凹的, 两面凹洼的\\n[建] 两面凹的
🧩 词语组成解析
concave
['kɔn'keiv]
n. 凹面，成凹形;
adj. 凹的;
vt. 使成凹形;
🗣️ 情景例句
Richard feels we need to find a small house. Richard
觉得我们需要一个小住宅。
They are never alone accompanied by noble thoughts.
思想高尚者决不会孤单。
when a significant number of people are living permanently in space.
如果有相当数量的人永久性地住在太空，