It varies with the square of distance so it goes - in order to go twice as far it takes four times as long.

速度是与距离的平方正相关的--,如果要扩散两倍的距离要多花四倍的时间

耶鲁公开课 - 生物医学工程探索课程节选

And hopefully getting a degree and earning probably twice the amount you would if you are working.

顺利的话，你得到一个学位，挣的钱大概是你直接工作的两倍多。

英国的高考 - SpeakingMax英语口语达人