女孩：Young female woman refers to human human. Refers to a transition phase from a baby into an adult woman, which is different in different societies, but basically considered a transformation of adolescence to adulthood.
姐妹：Sister and sister but do not include him, but also refer to a good friend who is a good friend, for example: I am a good friend, when I introduce my friend to others, I will say: "She is my good sister A" .
姑娘：An unmarried woman
美女：A good-looking woman
大姐：Wayan, the eldest sister or honorific title for a woman, used among colleagues, and in many places by women of elder age. It generally refers to the name of a middle-aged woman, or a woman who is more than 20 years older than herself.