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1·He has a concave stomach.

他的胃是凹的。《柯林斯英汉双解大词典》

2·He had a concave chest.

他曾有一个凹陷的箱子。

3·The palm of one's hand is slightly concave.

人的手掌是微凹的。《新英汉大辞典》

4·Since this is a concave function, it's not just the expected value.

由于这是一个凹函数，它不仅仅是期望值。

5·Because there is no abrasion between the concave and convex, the nut is reusable.

由于凹面与凸面之间没有磨损，螺母可以重复使用。

6·By extracting water from the detector's chamber, the detector's surface becomes a concave hemisphere.

通过从探测器的舱室中提取水分，探测器表面形成一个凹半球。

7·When water is pumped out of a chamber below the plate creating negative pressure, the stretchable sensors are pulled down, producing a concave shape.

当水从板下的一个腔中被抽出来产生负压时，可伸缩的传感器被向下拉，形成一个凹形。

8·Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.

水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。

9·The curved upper surface of a nonturbulent liquid in a container that is concave if the liquid wets the container walls.

弯月面容器中之静止液体的弯曲上表面，如果液体浸润了容器壁，那么弯曲面呈凹状。

10·We conclude that it is quasi - concave.

我们判定它是拟凹的。

(1)concave mirrorn. 凹透镜

(1)concave surface凹面，内弧面

(1)concave grating凹面光栅

(1)concave lens凹透镜；近视镜片

(1)concave bank凹河岸；冲刷河岸