题目内容：

意思We can see clearly that Beijingers can have more clear days

优质解答

We can see clearly that Beijingers can have more clear days.
估计是与北京经常发生的沙尘暴有关,沙尘暴一发生,天空就不clear了.
所以本句为：
我们确信,北京以后的天空会逐渐好起来的.（沙尘暴减少）