Yet many people are afraid of knowing these numbers; they don’t realize that they are a guide, and something that they can change, rather than an immutable destiny. Just as a student can improve his grades by studying or an athlete can improve his performance by practicing, so you can change many of the numbers that define your health prospects.
但许多人也非常害怕知道这些数字，他们不知道数字其实是个向导，而且数字是会变化的，正如学生可以通过努力提高成绩或者运动员通过训练刷新纪录，你也可以付出自己的努力，去改变那些定义你健康状况的数字。