A skin had formed on the top of the milk.

奶上结了一层奶皮。

《牛津词典》

I am having a skin graft on my arm soon.

我很快就要做手臂的植皮手术了。

《柯林斯英汉双解大词典》

I have a skin disorder, it destroys the pigmentation in my skin.

我有一种皮肤病，它破坏了我皮肤的天然肤色。

《柯林斯英汉双解大词典》

She was famous for her beauty. Madame Pierre Gautreau is wearing a low-cut black dress that shows off her pale skin.

VOA: special.2010.08.04

And so you can imagine that even in its— with all of this activity on your skin, even at its most--least serious level, it's a terrible disease.

你可以想象这些,即使在,伴随着皮肤上的任何运动,即使是最轻微的活动,也会带来严重的问题

耶鲁公开课 - 生物医学工程探索课程节选

If you get bacteria under your skin, if you get a cut and somehow that cut gets - bacteria gets inside there, the bacteria can reproduce on their own.

如果你皮肤里有细菌,而你又割伤了自己,并让细菌进入了伤口,细菌自身就可以繁殖

耶鲁公开课 - 生物医学工程探索课程节选

In the past few years players have started to wear this layer of protective gear meant to feel like a second-skin in a sport that has bigger, faster and stronger athletes than ever.

CNN: March Madness, this year with more padding

The American wore the same self-designed black lace number she had unveiled against Schnyder, a see-through skirted bodice featuring a skin-coloured undergarment.

BBC: Svetlana Kuznetsova scrapes through at French Open

And the final idea--they had four--was to actually take a cell from an adult animal--a skin cell from you, for example--and figure out how to turn it back into what it once was in its lineage, you know, way--so it's got all the DNA, but it's become specialized.

NPR: Ethical Guidelines for Stem Cell Research Proposed