The sky is blue, the air is clear.

天是蓝的，空气是明确的。

youdao

When the sun comes out, the air is clear and clean;

太阳刚出来时，空气清清爽爽的；

youdao

Choking the air is clear of dust mixed with the visible, only a handful of trees is weak thin.

呛人的空气中清楚夹杂著可见的尘土，屈指可数的树木也是衰弱单薄。

youdao

He said a lot of misinformation is being spread by critics of reform, adding that it is necessary to clear the air.

VOA: standard.2009.08.11

The air is luminously clear and, scoured by sea breezes, feels like it's rejuvenating the lungs.

BBC: Here comes the sun in Sweden

Some, however, think that the language in the Clean Air Act is so clear that even the conservative justices, who in the past have based decisions on the language of the statute in question while ignoring surrounding policy considerations, will argue that the EPA has the authority to regulate, and that they must do so.

FORBES: Supreme Court Takes On Global Warming?

One of the reasons the Prexige trial, called Target, was expected to help clear the air is that Prexige was compared to both ibuprofen and naproxen.

FORBES: Study Revives Debate On Arthritis Drugs