three

A traffic light has three colors: red, yellow, and green.

(Chinese) 交通信号灯有三种颜色：红、黄、绿。

The story of Goldilocks involves three bears.

(Chinese) 《金发姑娘》的故事里涉及三只熊。

One plus two equals three.

(Chinese) 一加二等于三。

On a standard dice, the opposite sides of three always add up to seven.

(Chinese) 在标准骰子上，数字三的对面点数加起来总是七。