But this color darkens when exposed to the sun.
但这种颜色暴露在阳光下将会变暗。
The sky above turns overcast, then steadily darkens.
头顶的天空开始转阴，然后渐渐黑了下来。
Themoon's shadow darkens part of Earth during a solar eclipse.
在一次日食中，月亮的影子使地球的一部分黑下来。
As the sun sets, the sky darkens and the moon and stars appear.
随着太阳落下，天空逐渐变黑，而月亮和星星开始出现。
A total solar eclipse darkens the skies in Chongqing municipality in China.
当日全食食甚来临，重庆市的天空被一片黑暗笼罩。
Clouds heap upon clouds and it darkens.
云霾堆积，黑暗渐深。
Clouds heap upon clouds and it darkens.
云霾重重堆积，天色暗下来了。
Why the sun lightens our hair, but darkens our skin?
为什么太阳能把头发晒浅，却能把皮肤晒黑？
Melanin darkens the skin and is the cause of suntan.
黑色素使皮肤变黑是人被晒黑的原因。
The fireworks display will begin at night, when the sky darkens.
烟花将在傍晚，当天空变黑的时候放。
In a cool climate, its appears pure blue, but darkens to a purple when the temperature rises.
在凉爽的气候下，它呈纯蓝色，但随着温度的升高，它会变暗，逐渐呈现出紫色。
But occasionally the sky darkens, the air becomes heavy, and a cool torrential rain fills the dry gullies.
可是有时天空也会突然转暗，空气变得浊重，接着就是一场急骤的冷雨倾注到干涸的沟壑。
Clouds heap upon clouds and it darkens. Ah, love, why dost thou let me wait outside at the door all alone?
云霾堆积，黑暗渐深。呵，爱，你为什么让我独在门外等候？
Clouds heap upon clouds and it darkens. Ah, love, why dost thou let me wait outside at the door all alone?
乌云堆积，越来越暗。呵，爱，你为何让我独自等候在门外？
I'd ferry across the Yellow River, but waterway blocked by ice; About to go up Mt. Taihang, but snow darkens the sky.
欲渡黄河冰塞川，将登太行雪暗天。
Creates a new dark color object for the control from the specified color and darkens it by the specified percentage.
根据指定的颜色为控件创建一个新的深颜色对象并按照指定的百分比使其颜色变深。
In response to the UV rays frying your inner layer of skin, your body produces more melanin pigment that darkens the skin.
作为对紫外线灼伤内皮层的反应，你的身体会产生更多的黑色素使皮肤颜色变深。
Looks at the color information in each channel and darkens the base color to reflect the blend color by decreasing the brightness.
查看每个通道中的颜色信息，并通过减小亮度使基色变暗以反映混合色。
The window darkens when the outside air temperatures soar, and becomes transparent when it gets cold in order to capture free heat from the sun.
当外界气温飙升时，窗户会变暗，当外界变得寒冷时，它会变成透明，以捕获从太阳发出的热量。
Coloring the skin may sound simple, but nature requires at least 25 different genes to synthesize, package and distribute the melanin pigment that darkens the skin and hair.
给皮肤上色看起来很简单，但大自然却至少需要25种不同的基因来合成、包装及输送黑色素到人体各处以使皮肤和头发呈现不同颜色。
The first permanent photograph was made in 1826 by Joseph Nicéphore Niépce, building on a discovery by Johann Heinrich Schultz (1724): a silver and chalk mixture darkens under exposure to light.
1724年，约翰·海因里希·舒尔茨发现银和白垩的混合物见光后会变黑。
Total solar eclipses can be frightening for people who are unaware of their astronomical explanation, as the Sun seems to disappear in the middle of the day and the sky darkens in a matter of minutes.
对于没有天文知识的人来说，日全食可说是非常恐怖的景象，因为太阳在白天消失，而天空也在短时间内暗淡下来。
Total solar eclipses can be frightening for people who are unaware of their astronomical explanation, as the Sun seems to disappear in the middle of the day and the sky darkens in a matter of minutes.
对于没有天文知识的人来说，日全食可说是非常恐怖的景象，因为太阳在白天消失，而天空也在短时间内暗淡下来。
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