Twin is used to describe a pair of things that look the same and are close together.
the twin spires of the cathedral.
那座大教堂的双尖顶。
Twin is used to describe two things or ideas that are similar or connected in some way.
the twin concepts of liberty and equality.
自由和平等这两个相关的概念。
twins
Twins are two people who were born at the same time from the same mother.
Sarah was looking after the twins.
萨拉当时正在照看那对双胞胎。
I think there are many positive aspects to being a twin.
我觉得作为双胞胎中的一个有很多积极方面。