With an indirect, natural light source (under a tree, indoors near a window) -it will show whether blue really is your best color.

试衣服时使用白色墙作为背景。使用非直接照射的自然光源(树下靠近窗户的室内)，这会让你知道蓝色到底是否真的是你的最佳颜色。

youdao

The first is the general lighting, natural light source from the outside world and an artificial lighting that is a variety of lighting equipment.

首先是一般照明，来源于外界天体的自然光源和一种是人工照明即各种照明设备。

youdao

Test-drive clothing against a white wall, with an indirect, natural light source (under a tree, indoors near a window)--it will show whether blue really is your best color.

在非直射的自然光下（如树下或室内靠近窗户的地方），白色墙壁前试穿衣服。这样可以显示：对你来说，蓝色是不是最好的颜色。

youdao

Robert noted with interest that there is abundant natural light from dawn to dusk that might provide a renewable source of electrical power.

FORBES: GoalZero -- How To Create An Industry (And A Profit) By Doing Good