感觉结实的，铁铸的或变黑的钢。
烟花将在傍晚，当天空变黑的时候放。
The fireworks display will begin at night, when the sky darkens.
暮色的残晖正开始把上面的东西变白，下面的东西变黑。
The twilight had begun to whiten what was on high and to blacken all below.
你经常会在天变黑，太阳落山的时候看到我。
You would see me most often at sundown when it's getting dark.
为什么我的脚趾甲会变黑？
移动左边的滑块到右边，直到阴影完全变黑。
Move the left slider to the right until the shadows are completely black.
张教授：重要的是观察有无糜烂、变黑或恶臭。
ProZhang: It is important to observe the erosion, black and foul smell.
我的灰白胡须变黑了么？
所有人的目光都聚集在电视上之时，屏幕突然在一瞬间变黑。
All eyes were on the TV when suddenly, the screen became black.
突然，天空变黑了，我抬头看到黑色的乌云。
Suddenly, the sky becomes dark. I look up and see dark storm clouds.
开端是绿的，但阳光战雨水使它们很快变黑。
At first they are green. But the rain and sunshine make them red soon.
开端是绿的，但阳光战雨水使它们很快变黑。
At first they are green. But the rain and sunshine make them red soon.
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