她的皮膚光滑。

Her skin is smooth.

Source: Tatoeba

她的肌肤如同牛奶一样洁白，身上没有一处斑点。

Her skin was white as milk and she had not a single blemish anywhere.

Source: Tatoeba

故天将降大任于是人也，必先苦其心志，劳其筋骨，饿其体肤，空乏其身，行拂乱其所为，所以动心忍性，曾益其所不能。

When Heaven is about to bestow a great responsibility on a person, it must first distress their mind, exhaust their muscles and bones, starve their body, and deprive them of resources, making their actions go against their will. This is done to stimulate their heart and temper their character, thereby increasing what they are capable of.

Source: Tatoeba