求翻译：　　面膜是一种敷在脸上的美容护肤品，有的敷后经过20～30分钟，便会形成一层紧绷在脸上的薄膜，所以称做面膜。但是，有的面膜干燥后不形成膜；不能整块地掀起来，只能用水把它洗掉，准确地说，这些面膜应该叫做敷面涂剂，但习惯上，因为操作和效果跟做面膜是一样的，也就笼统地归到一起叫面膜了。是什么意思？

The mask is to apply to the face skin care products, some deposited after 20 to 30 minutes, will form a layer of tension in the face of the film, so called mask. However, some mask dry and do not form a film; not block lifted, the only water to wash it off, to be precise, the mask should be called t

　　The facial mask is one kind spreads on the face the cosmetology skin appliances, after some spread passes through 20~30 minutes, then can form one to tie tight on the face the thin film, therefore the name makes the facial mask.But, after some facial masks dry do not form the membrane; Cannot put

　　Mask is a deficiency in the face of the beauty and skin care products, some after 20-30 minutes after application, will form a layer of tight in the face of the film, so called mask. However, some dry mask does not form a film; unable to set off block, only it washes off with water, specifically,

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