描述两个来自于同一个家庭的人。
You should say:
Who these two people are
How much these two people have similar personalities (characters)
How much they look similar
And explain how (how well) the two people get along with each other.
参考范文：
To start with, the two individuals that I’d like to talk about are twin sisters, one is named Lily, and the other is Lucy.
We went to the same high school together, which means I’ve known them for quite some time . As I mentioned in the very beginning-they are twins, so it’s no surprise that the girls look like two peas in a pod. Believe it or not, having been friends to them for this long, sometimes I still have problems telling them apart. However, the funny thing is that although they look exactly alike, their characteristics are another story.
To be more specific, Lily is passionate about outdoor activities , such as badminton, basketball, swimming , you name it. On the contrary, Lucy is more of an indoor kind of girl. You know, she prefers to stay at home, reading a book, surfing the Internet, or something like that.
Well, no matter how different the sisters are, they have this special bond that could never be broken. For example, when they were at school, they kept each other’s company all the time and I have to say that they looked so adorable next to each other. Honestly, I always wish that I could have a twin sister, which I believe could be so much fun! All right, that’s my story of the twins.
