我不知道为什么天那么蓝，但我知道我的心比天更蓝。

I don't know why the sky so blue, But I know that my heart bluer than the sky.

youdao

要使我们城市的天更蓝水更清，我们还的做大量的工作。

We should make a lot of work before we can make the sky bluer and the water cleaner in our city.

youdao

让天更蓝，让地更绿，让客户更满意，是我们百炼化工永恒的追求。

Making the day bluer, making the ground greener, making the customer be more satisfied is the goal that we pursue forever.

youdao