"History has shown us that one of the most effective ways to defeat terror is by enhancing our basic freedoms.

VOA: standard.2009.03.11

In many ways you can look at most of our experiences, psychological effective experiences on a continuum, where some of them fall below the zero, the negative experiences or the painful experiences and the positive or the pleasurable experiences between the zero and the positive.

可以从多方面来看我们的经验，在心理连续谱上看有效心理经验，有时候会跌倒0以下，不愉快或痛苦的经历,积极或愉快的经历,分别在0与正值之间。

哈佛公开课 - 幸福课课程节选

Another is developing better ways to hire, keep and reward effective teachers and school leaders.

VOA: special.2009.07.30

The idea is that a doctor might find other ways that a drug is effective.

VOA: special.2009.09.11