杨辉三角，藏着多少秘密？

This triangle of numbers is called Pascal's triangle. 这个数字三角形叫杨辉三角。 Each number is the sum of two numbers above it. 每个数都等于它上面两个数相加。 The outside edges are all ones. 三角形的两条边全是1。 The numbers hide many cool patterns. 里面藏着好多有意思的规律。 You can find powers of two in it. 你能在里面找到2的倍数。 It also links to coin flipping. 它还跟抛硬币的结果有关。 People still discover new things in it today. 直到今天，人们还在里面发现新规律。