The mask is convex only on one side.

具只有一凸。

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

多数哺乳动物都有一种晶状体结构——一种透明、凸起结构，可折射光线成像。

The nose is upturned, and the eyes slightly convex.

雕刻动物鼻头上翘，微凸。

Light comes in through the cornea and pupil and hits the lens — the convex, transparent disc that focuses that light and projects it onto the retina, which makes up the inner layer of the back of the eyeball.

光线通过角膜和瞳孔进入并到达晶状体——凸起透明圆盘，将光线聚焦并投射到视网膜上，视网膜构成球背内层。

They keep a Whale's Rib of an incredible length for a Miracle, which lying upon the Ground with its convex part uppermost, makes an Arch, the Head of which cannot be reached by a Man upon a Camel's Back.

一头体长惊鲸鱼肋骨作为奇迹被当地保存下来，它立在地上，中间凸起部位形如拱门，就站在骆驼背上也够不到那拱门顶端。

This is made possible through something called a lenticular lens – a corrugated sheet in which each ridge is made up of a convex – or outward-curving – lens.

这通过一种叫做柱状透镜东西实现，柱状透镜一种波纹状薄板，其每个凸起处都由凸透镜（即向外弯曲透镜）组成。

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

我们能在其中几种身上发现隆起这里个潮湿体腔保护其呼吸阻力不受外世界干燥影响。

Is the mask convex on one side or two?

具一凸还凸？

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

玻璃镜子中世纪最新尖端技术，但凸镜唯一可能形状。

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

我想象它更平，更圆, 但现在凸, 设计只出现在一边。

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

现在月亮已经超过了半满，我们就称这个形状为“凸月”，英文中“gibbous”意思肿起或凸起意思。

The bronze plaque is slightly convex.

弧形铜胎略微拱起。

And this is a classical example of convex shapes.

这凸形经典示例。

As a result, the magnetic lenses act as convex or converging lenses.

因此，磁透镜起到凸透镜或会聚透镜作用。

There's other things, you know, like I slightly rounded this pole here, it's just a little nuance 'cause when you pound a stake in, if you picture it, if it's convex, when you're pounding it it's gonna blow the fibers apart.

- 还有其他一些事情， 你知道，比如我把这里柱子稍微磨圆了一点，这只一个小细节， 因为当你把木桩敲进去时，如果你想象一下， 如果凸话， 在敲打时候它会把纤维震散。

And if you work it out, you would probably have a weak convex lens with about an 18-inch focal length in combination with a pretty strong concave lens with a focal length of about 6 inches.

如果你算一下，你可能会得到一个焦距大约为18英寸弱凸透镜，与一个焦距约为6英寸强凹透镜组合。

And if the molecules in the liquid are more attracted to each other than to the container, as is the case with mercury and glass, they'll form a convex meniscus.

如果液体中分子相互吸引程度大于它们与容器之间吸引力，就像水银和玻璃情况， 它们会形成一个凸形弯月。

If the subjects are at two very different distances from the lens the operator will need a stronger or more convex diopter, like a plus two.

如果主体与镜头距离相差甚远， 操作员则需要一个更强或更凸近摄镜，例如加二号。

And it's cut in a convex manner, so the edges are thin and the middle part is thicker, if you want to see better close up.

它采用凸切割，边缘较薄而中间部分较厚，这样近距离观察时能看得更清楚。

So all Alice needs to do is find just a single convex solid out  there where she already knows the average area of its shadow.

所以爱丽丝只需要找到一个已知其阴影平均积凸体即可。