天变黑了 The day become black ; Day darkened ; Getting dark
天空变得黑了 The sky is getting dark
先天性网膜黑变病 congenital melanosis of retina
先天性结膜黑变病 congenital melanosis of conjunctiva
不知道白天变成黑夜 Don't know day into night
天变黑
The sky gets dark.
以上为机器翻译结果，长、整句建议使用 人工翻译 。
天变黑了，我不得不回家。
It's getting dark. I have to go home.
youdao
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.
教授：暴风雨是因为云层形成之后天变黑爆发的，这像一个论点吗？
Prof: the storm broke because the clouds formed and the sky Blackened. Does that sound like an argument?
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