concave

concave

英 ['kɒnkeɪv]
　　美 [kɑn'kev]

adj. 凹的，凹面的
　　n. 凹面
　　vt. 使成凹形

中文詞源：

concave 凹狀

con-, 強調。-cave, 洞穴。洞穴狀的，凹進去的。

例句：

1. The palm of one's hand is slightly concave.
人的手掌是微凹的.

2. The graph of a concave function is always below its tangent.
一個凹函數的圖象總在它的切線的下方.

3. The cloven hooves are sharp edged , elastic and concave.
蹄鋒利,呈凹形, 富有彈性.

4. Alternative characterization of concave and convex functions which is sometimes useful.
對於凹函數和凸函數還有一個替補的表征,有時它是有用的.

5. In adults its contour may be straight, slightly concave or slightly convex.
成人肺其形狀可以是直的, 輕微凹下或輕度突出.