In many cases, the people performing the teeth whitening were untrained and unqualified.

在很多案例中，操作牙齿美白手术的人都未经过培训且没有手术资格。

Harry saw is pupils contract to thin slits, saw the skin around his eyes whiten.

哈利看到他的瞳孔缩成了两条窄窄的细缝，看见他眼睛周围的皮肤变白了。

A paste made from marble, wheat and bryony, a poisonous plant, could whiten skin.

一种由大理石、小麦和泻根（一种有毒植物）制成的浆糊可以美白皮肤。

That means paper companies can use bacterial enzymes to whiten paper and lessen the need for chlorine.

这意味着造纸公司能使用细菌酶来漂白纸张，减少对氯的需求。

It's what health trend fanatics claim to be using to detox, brighten skin and whiten their teeth.

这是那些狂热追求健康的人号称它可以排毒、提亮肤色，美白牙齿的东西。

The LGA discovered that some of the whitening cosmetics they tested contained banned ingredients and were thus illegal.

LGA发现他们检测的一些美白化妆品中含有禁用成分，因此是违法的。

A fine layer of snow covered the yard, dusted the top of my truck, and whitened the road.

院子里覆盖了一层薄雪，我的车顶披上了银装，道路铺上了白色的地毯。

Or if they've had their teeth whitened perhaps.

或者如果他们已经美白了牙齿。

" To whiten your teeth" means to make them whiter.

“美白牙齿”的意思是让牙齿更白。

The early light whitened the window.

清晨的阳光照亮了窗户。