Every tree planted today is a legacy for tomorrow's generations.
化学的乐趣在于看到不可见的东西变得可见。
我们要做的是让中国汽车工业在全球市场上具有竞争力。
诗歌不是奢侈品,而是必需品。
If one only wished to be happy, this could be easily accomplished; but we wish to be happier than other people, and this is always difficult, for we believe others to be happier than they are.