It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.

生命短暂，让它甜蜜。

亲密关系的最大敌人是讽刺。

The ultimate goal of machine learning is to make computers learn from experience and improve their performance over time.

政策制定者应乐于根据新证据修正他们的观点。