The reason for that color shift was murky-perhaps for UV protection or camouflage.

颜色变化的原因尚不明朗，也许是为了防紫外线或伪装。

And in general, most fabrics made with shiny, synthetic, or tightly-woven fibers provide lots of UV protection.

一般来说，大多光滑的合成织物或紧密编织的织物能阻挡大量紫外线。

Single mirrored lens and silver tone with 100% UV protection.

单镜面镜片，银色，100% 紫外线防护。

Where's the cutoff of UV protection to where you just can't see?

紫外线防护到你看不到的地方在哪里？

While this camera isn't a perfect measure of UV protection, it'll be able to show whether I get an even application or not.

虽然这款相机检测紫外线防护的性能并不完美，但它可以显示我的防晒是否涂抹均匀了。