请参照如下的英文解释.
首先第一步是toners,是收缩水,收缩水里一般含有酒精等成分,对皮肤起到除油和紧缩的作用.但是注意拥有干性皮肤的人,或者是皮肤本身已经极度缺水的人,可以直接跳过此项,因为收缩水会使皮肤变得更加干燥.
其次,就到了我们关心的serum,serum是液状的化妆品（翻译为精华素）,大多含有抗氧化剂或者是缩氨酸（肽）.一般情况下serum要首先使用,这样它其中昂贵的成分才能被你的皮肤吸收.如果你先用别的诸如cream之类的化妆品,那么恐怕serum就会被阻隔在皮肤外而无法吸收了.这其中,值得注意的是,含有硅油的serum类化妆品又另当别论.硅油能够有效地锁住皮肤的水分,但是同时也形成了一层屏障,使得其上所有的保养品无法渗透到皮肤内.所以如果是含有硅油的serum,应该最后使用.如果说你有什么处方类的保养品,那么和serum一样,要首先使用,以保证吸收.如果你又有处方类保养品,又有serum,那么先抹处方类保养品再抹serum.
最后说道,我们关心的cream,cream又分为face cream和eye cream.(脸霜和眼霜）.
脸霜和眼霜可能是简单的保湿剂,也可能是复杂的抗衰老保养品.
眼霜一般情况下,含有抗氧化剂,来保护眼部最脆弱的肌肤.
一般情况下,眼霜要先于脸霜使用.如果你先使用脸霜,再使用眼霜,你有可能会把眼霜揉到眼睛里面去.
总结了一下,
这些保养品的使用层次是
1：收缩水（也可跳过）
2：处方类保养品
3：精华素（不含硅油的精华素,如果含有硅油那么就要放到最后使用）
4：眼霜
5：脸霜
6：含有硅油的精华素
Step-by-step skin care?It’s complicated.You have a cabinet full of toners,creams,and serums and you don’t know what goes on when.Using products in the wrong order could mean you’re not getting the most for your money.Here’s a guide to make it easier for you:
1.Toners
Toners are astringents,which means they contract tissue like pores,making your face feel tighter.They often contain alcohols and are used to remove oil from the skin as well as tightening.Therefore,you should use them first.If you have dry or sensitive skin,however,you might skip them completely because they can make dryness worse.
2.Serums
Serums are liquid cosmetics.They usually have antioxidants or peptides to minimize the day’s damage done to your skin and to give you a more youthful appearance.Serums are applied first so that there’s nothing between their expensive ingredients and your skin.The exceptions are serums that contain silicone or dimethicone.Silicone helps lock moisture in your skin,but it also acts as a barrier hindering anything above it from getting to your skin.Silicone serums should be applied last.Like expensive serums,any prescription medications should also be applied first to ensure that their active ingredients penetrate the skin unhindered.If you have both,then apply the prescription first and the serum second.
3.Eye cream and face cream
Face and eye creams can be simple moisturizers or complex anti-aging products.Eye creams usually have antioxidants to help restore this most delicate skin.If you have one,then apply it before your face cream.Otherwise,by applying your face cream first,you risk rubbing it into your eyes.Once your prescription medications (if any) serums,and eye creams have absorbed,then apply your face cream last.If your serum has silicone or dimethicone,then apply it last,so its protective ingredients are the outermost barrier.