Now in a new layer above the watercolor layer, and drawing straight up, make a Linear Gradient going from black to transparency so that afterwards your canvas basically fades to black down the bottom.
现在在水彩图层之上再新建一个图层，然后从下至上从黑色到透明做线性递减绘制，这样基本上整个画布到底部就褪化为黑色了。
I must have a look down into the black caldrons.
我得朝那些黑罐子里看一看。
The black and white flag went down, and the race began.
黑白旗落下，赛跑开始了。
After a while, the little black rabbit sat down.
过了一会儿，小黑兔坐了下来。
"One of the sessions that moved me the most was state violence on black women and black girls," says Chasin, explaining that in one room, people wrote down the names of those killed because of it.
“其中最触动我的活动之一是黑人妇女和黑人女孩所遭受的国家暴力。”查西说道，描述了人们在一个房间内写下暴力下的遇害者名字的场景。
Yes, it's black but not exactly plain black—it has some narrow stripes down it, sort of grey.
是的，它是黑色的，但不完全是纯黑色，它有一些窄条纹，有点灰色。
I look down at my toes in the cool, black mud of the taro patch.
我低头看了看自己踩在凉爽的芋头黑泥地里的脚趾。
There was the wonder I felt when I saw a brace of mountain like, spotted, black-and-white horses clopping down a dusty road through clouds of powdered clay.
当我看到一对山，就像黑白斑点的马，踏着尘土飞扬的道路，穿过尘土飞扬的粘土时，我感到了一种奇妙的感觉。
Beyond that world is the deep and pitch-black region that stretches down to roughly 35,800 feet, the bottom of the Marianas Trench.
在那个世界以外的是片幽深、漆黑的马里亚纳海沟底部，一直延伸到大约35，800英尺以下。
His beard was as black as pitch, and so long that it reached from his chin down to his feet.
他的胡子又黑又长，黑得像沥青一样，长得从下巴一直拖到脚。
A black frown settled down upon the hermit's face, and he clenched his bony hands with a vindictive energy.
隐士的脸上现出凶恶的神色，他握紧瘦骨嶙峋的双手，一副要报仇的样子。
When bread is baked (烘焙), the carbohydrates break down into black carbon and water.
面包在烤制的时候，碳水化合物会分解成黑碳和水。
He insisted on having the agreement down in black and white.
他坚持要将协议用书面形式写下来。
The enzyme can break down several dyes, such as bromothymol blue, eriochrome black, malachite green, and reactive brilliant blue.
这种酶可以分解几种染料，如溴麝香草酚蓝、羊毛铬黑，孔雀石绿和活性艳蓝。
"It was like a black umbrella coming down on us," recalls Majid Chaar, then a television director and now Chief of FAO's Media Relations Branch.
“它如同一把黑伞向我们盖过来，”马吉德·沙阿回忆说。他当时是一家电视台的导演，现任粮农组织媒体关系处处长。
The black paint had run down in little sharp points beneath each letter.
写字用的黑色颜料在每个字母下面都流成了一个个小尖头。
When a black body cools down, at some point it no longer radiates light in the visible spectrum, giving off infrared photons instead.
当黑体变冷的时候，在一定的温度以下，它就不会再发出可见光而是放出红外光子。
The large black bird started jumping up and down, its wings throwing bird seed in every direction.
那只大黑鸟开始跳上跳下的，它的翅膀扇得鸟食到处都是。
The black tide continues down the Po River and is expected to reach the Adriatic by the weekend.
黑色的油污带在波河不断扩散，预计周末就会抵达亚得里亚海。
Tears stream down the faces of older black audience members.
老年黑人观众脸上流淌着泪水。
The surgeon came in and marked my forehead with a large black arrow pointing down at my left eye.
主治医师在我的左眼上花了一个大大的黑色的圈。
Black Hawk Down (2001, Ridley Scott) - Somalian mission.
《黑鹰计划》(2001年，导演雷德利·斯科特)——索马里行动。
He insisted on putting the agreement down in black and white.
他坚持要把这项协议用白纸黑字写下来。
I looked down that black hole, then turned and climbed the sand mound to hide my unprofessional tears.
我向下看了看了那个挖出来的黑洞，然后我回过头来爬上了那个小山偷偷擦掉了眼泪。
"If black holes grow by merging, by combinations of black holes, they should spin down quite quickly," Blandford explains.
如果黑洞是依靠合并来成长的，在合并的过程中，他们的旋转速度很快就会变慢。
Some rocks from volcanoes break down to form black sand.
有些火山岩被撞碎后会形成黑色的沙。
I think this has to go down as another serious black mark for men.
我想，这个也可以作为男人的另外一个严重污点了吧。
Things got bad for a while, till the black family that lived down the road brought my mother some food, including some good corn.
那段日子生活很不如意，直到住在不远处的一户黑人家庭给我母亲送来一些食物，包括一些上好的玉米。
For he must have sensed that this confrontation was shaping up as three powerful black men coming down hard on a white cop with a stellar record who had only done his conscientious duty.
因为他一定是已经意识到，由于三位有权势的黑人男子正在严厉抨击一名履历辉煌的白人警察，正使这一冲突趋于明朗化，而警察当时的行为只是恪尽职守而已。
A torrent of digits cascaded down shiny, black rocks and emptied into a gleaming, blue lake.
一股数字洪流瀑布似的落下亮闪闪的黑色岩石，倾泻在一个泛着微光的蓝色湖泊里。
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