early 15c., from Old French concave (14c.) or directly from Latin concavus "hollow, arched, vaulted, curved," from com-, intensive prefix (see com-), + cavus "hollow" (see cave (n.)).
雙語(yǔ)例句
1. The palm of one's hand is slightly concave.
人的手掌是微凹的.
來(lái)自《現(xiàn)代漢英綜合大詞典》
2. The graph of a concave function is always below its tangent.
一個(gè)凹函數(shù)的圖象總在它的切線的下方.
來(lái)自辭典例句
3. The cloven hooves are sharp edged , elastic and concave.
蹄鋒利,呈凹形, 富有彈性.
來(lái)自辭典例句
4. Alternative characterization of concave and convex functions which is sometimes useful.