我从来没有见到过被烟雾笼罩的白色天空，我的胸口因污染的空气而感觉疼痛，我感到呼吸困难。

I had never seen the sky white with smog before, and my chest hurt from the pollution, making it difficult to breathe.

youdao

最近，当我走在山路上，我会感到有些呼吸困难，并且上个礼拜我感到点燃烧烤的炉子总要花上很长时间。

I HAVE been feeling a little short of breath on mountain paths lately, and it took me ages to light the barbecue last week.

youdao

“灰尘进入我的眼睛，而且使人呼吸困难。”她说。

"The dust gets in my eyes and it makes it hard to breathe," she says.

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