Often the sky is covered by large clouds of smoke from chimneys. The air is nearly suffocating especially in the evening as it becomes cold and the smoke is spreading everywhere.

城市里的天空往往是浓烟密布，空气令人窒息，尤其是在傍晚，因天气冷，烟雾迅速蔓延开来。

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Often, the sky is covered by large clouds of smoke from chimneys. The air is nearly suffocating, especially in the evening as it becomes cold and the smoke is spreading everywhere.

都会里的天空往往是浓烟密布，空气令人梗塞，尤其是在傍晚，因天气冷，烟雾快速蔓延开来。

youdao

Often, the sky is covered by large clouds of smoke from chimneys. The air is nearly suffocating, especially in the evening as it becomes cold and the smoke is spreading everywhere.

都会里的天空往往是浓烟密布，空气令人梗塞，尤其是在傍晚，因天气冷，烟雾快速蔓延开来。

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