为了洁净天空，近年来，重庆的第一个举措就是更换的士的燃料，将油箱里的汽油换为天然气。

To clean its skies, in recent years, Chongqing first changed the fuel of its taxis, replacing their gasoline tanks with natural gas.

youdao

没有什么事能像这样，一边攀向明亮洁净的天空，一边欣赏着壮丽的洛子峰和阿姆达布拉姆山——和垃圾堆。

There's nothing like waking up to bright clear skies with spectacular views of the Lhotse and Amu Dablam ranges - and a rubbish dump.

youdao

在瑞典，我们一年都能看到亮堂，洁净的天空，淡淡的云朵。

In Sweden, we can see the bright, clean sky, light clouds.

youdao