The sky is dim and the earth is dark; describes a scene of severe weather conditions such as heavy winds, dust storms, or torrential rain, or metaphorically, a state of extreme chaos, gloom, or intensity.
大风刮得天昏地黑，行人几乎无法前行。
The strong wind blew so fiercely that the sky and earth turned dim and dark, making it almost impossible for pedestrians to move forward.
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