"Matching methods can be a powerful tool when randomization is not possible."

在地球系统的伟大运作中，有机和无机力量完美和谐。

Given the choice between the experience of pain and nothing, I would choose pain.

过多地粉饰命定之说,用来教育广大的愚昧朴实的民众。

透明建立信任，而信任是领导力的货币。