On overcast days, however, the birds were disoriented and had trouble locating their food box.

然而，在阴天，这些鸟儿会迷失方向，难以找到食盒的位置。

youdao

Nor does the effect work on overcast days.

阴天的时候也无法发挥作用。

youdao

A father is the sun, even in overcast days, I also can feel his light.

父爱是太阳，即使在乌云密布的日子里，我也能感受到他的光芒。

youdao

The architects painted the cables white, so that they would disappear into the sky on overcast days, and complement the blue of clear skies.

WSJ: A Concrete Ribbon Through the Clouds | Millau Viaduct | Masterpiece by Joseph Giovannini

You can choose different colors and mirrored or non-mirrored, but all are packaged with matched low and high VLT duos to cover sunny days, overcast days, and days when you get both sun and late day flat light.

FORBES: Ski Goggles Part 2: The Newest Technology