The mask is convex only on one side.

面具只有一面是的。

Is the mask convex on one side or two?

面具是一面还是两面？

The bronze plaque is slightly convex.

弧形铜胎略微拱起。

The nose is upturned, and the eyes slightly convex.

雕刻的头上翘，眼睛微。

Now more than half full, we say its shape is “gibbous”, which means swollen or convex.

现月亮已经超过了半满，我们就称个形状为“月”，英文中“gibbous”的意思是肿起或起的意思。

I imagined it was flatter and more circular, but this is convex, with a design only on one side.

我想象的它更平面，更圆, 但现, 设计只出现一边。

Most mammal eyes have a structure called a lens—a transparent, convex structure whose shape refracts light to enable sight.

多数哺乳的眼睛都有一晶状体结构——一透明、起的结构，可折射光线成像。

And this is a classical example of convex shapes.

是形的经典示例。

It did have kind of these convex mirrors.

它确实有面镜。

A copper converter and a convex copier were found in his house.

他家发现了一只铜的变频器和一只的复印机。

Glass mirrors were the latest cutting edge technology in the middle ages, but the convex mirror was the only shape possible.

玻璃镜子是中世纪最新的尖端技术，但面镜是唯一可能的形状。

Say we have a lens that has a spherical face on both sides, known as a convex lens.

假设我们有一个具有球面的镜头 两侧，称为透镜。

You might notice that the image is upside down, which will always be the case for convex lenses.

您可能已经注意到图像是上下颠倒的，透镜总是如此。

None of the letters in the word " convex" are themselves convex.

“”一词中的所有字母本身都不是的。

But something like the symbol pi is not  convex.

但像 pi 样的符号并不是的。

As a result, the magnetic lenses act as convex or converging lenses, focusing all the electrons down to a focal point.

因此， 磁透镜充当透镜或聚光透镜，将所有电子聚焦到一个焦点。

Let's name this set of all possible sums D. Your task is to prove that D is also a convex set.

我们将个所有可​​能和的集合命名为 D。您的任务是证明 D 也是集。

Their convex bulge we see on several species covers a moist cavity that protects its respiratory resistance from the dryness of the outside world.

我们能其中几身上发现隆起里面是个潮湿的体腔保护其呼吸阻力不受外面世界的干燥影响。

Unfold that sheet, and there's a pattern of lines, each of which represents a concave valley fold or a convex mountain fold.

展开那张纸，有一线条图案，每条线代表一个凹谷折或山折。

But if it's less than 1, it's non-convex, and how close it is to 1  tells you how close it is to being convex.

但如果它小于 1， 则它是非的，并且它与 1 的接近程度可以告诉您它与的接近程度。