obscure|obscured|obscures

云朵遮挡住了部分阳光。

Clouds partially ___obscure the sun.

这些复杂的统计数据让整个问题更加模糊不清。

The complicated statistics ___obscured the whole issue.

雨水模糊了远处建筑物的细节。

The rain ___obscures the details of the distant buildings.