The probable error of a correlation coefficient is not a thing which can be deduced from first principles, but must be found empirically.
相关系数的可能误差不是可以从第一原理推导出来的东西,而是必须通过经验找到的。
You can't change the past, but you can shape the future.
我们现在看到的最错误的想法便是以为身体活动就只是身体活动而已,以为它不具有更高层次的功能,其实,心智的发展必然和身体动作相配合,而且是相互依赖存在的。
Adaptability is the key to survival in a rapidly changing industry.