Giant manta rays have a unique body shape.

巨的蝠鲼有着独特的体型。

But remember that those truly glorious days, those glorious rays of sunshine that streak through a cloudbreak, they can only happen in cloudy skies.

但请你记住，那些拨见日、光芒万丈的美好时刻，永远只会诞生之后。

Scientists have created metamaterials to guide rays of light around tiny, two-dimensional objects.

科学家已经制造出超材料能引导光线绕过微小的的二维物体。

Your little ray of sunshine is ready to beam again.

你们的小太阳准备重新发光发热啦。

A ray of moonlight lay across its staring face.

一道月光洒在那张目瞪口呆的脸上。

Goofy! The shrink ray, it really worked!

高飞！收缩射线，真的起作用了！

" Right little ray of sunshine, aren't you? " said Ron.

“要看到一些光嘛！”罗恩说。

The magnetosphere is a shield, protecting us from dangerous cosmic rays.

磁层是一个屏障，保护我们免受危险宇宙射线的侵袭。

The manta rays include one species that lives near reefs and another that's migratory.

蝠鲼是包括在其中生活在礁附近的一个物种, 而另一种则有迁居习惯。

Was there a ray of hope, then?

那么，有一线希望？

In the tropics, the sun's rays strike the earth head on, and their strength is more or less constant all year round.

在热带地区，太阳光直射地，全年的辐射强度定。

At these latitudes, the sun's rays are glancing and not enough of their energy reaches the ground to enable trees to grow.

在这个高纬度地区，太阳辐射只能斜射到这片土地，到达地面的能量很少，并不足以支持树木生长。

He said gamma ray bursts that last hundreds of seconds, as this one did, are thought to be caused when massive stars explode.

他说，持续数百秒的伽马射线暴，就像这一次一样，被认为是质量恒星爆炸时产生的。

Astonishingly, Leonardo already knew from his optic studies that light rays do not come to a single point in the eye.

令人惊讶的是，列奥纳多已经从他的光学研究中知道光线不会到达眼睛的单个点。

And some wear them for protection from ultraviolet rays.

有些人戴隐形眼镜是为了保护眼睛免受紫外线伤害。

So, why not take a break between meetings and soak up some rays to combat the tiredness and jet lag?

既然如此，何不在会议之间的空当偷个闲，吸收一点阳光，抵御疲劳与时差呢?

Your X rays won't penetrate her body.

你的X光不可能透视她的身体。

The way a normal mirror works is the light rays bounce off the surface, which is perfect, and they focus in a certain point at the same time.

普通镜子的工作方式是光线从表面反射出来，这是完美的，他们同时集中在某一点上。

Both of these ingredients are used to help protect people from the sun's ultraviolet rays but some scientists believe that when they wash off people's skin, they're harmful to marine ecosystems like coral reefs.

这两种成分都被用来保护人们免受太阳紫外线的伤害，但是一些科学家认为，当它们洗掉人们的皮肤时，对海洋生态系统如珊瑚礁是有害的。

The result is a brilliant display of the common green and yellow, less common blue and violet, even rare reds painting the night sky in ribbons, arcs or shooting rays.

其结果是一个普通的绿色和黄色，不常见的蓝色和紫罗兰色，甚至罕见的红色绘制在缎带，弧或射线的夜空辉煌的展示。