"It's not about what you say, it's about what you do."

试管婴儿的研究是出于帮助不孕夫妇的愿望。

法律体系不是静态的；它们随着时间的推移而演变。

成为质量的标杆，有些人并不习惯追求卓越的环境。

Natural gas is a bridge to a cleaner energy future, but we must cross that bridge responsibly.

The foundation of national morality must be laid in private families.

我们每个人都有责任。我们可能认为我们生活在远离海洋的地方，但我们没有。我们在这里所做的实际上对海洋有直接影响——而海洋所做的又会反过来影响我们。

A little more persistence, a little more effort, and what seemed hopeless failure may turn to glorious success.