old the older 的区别

old 是年岁或者老的意思，而the older则是更老的意思，区别可以从以下例子看出：

My classmate lives in Sydney, both of us are over 60 years old, born in the same month, but she is the older one. 我同学住在悉尼，我们都是60多岁，同月出生，但她比我更大。