【分析解答题】

There is probably no limit to what science can do in the way of increasing positive ex cellence.

Health has already been greatly improved; in spite of the lamentations of those who idealize the past, we live longer and have fewer illnesses than any class or na tion in the eighteenth century.
With a little more application of the knowledge we already possess, we might be much healthier than we are.And future discoveries are likely to accelerate this process enormously.
So far, it has been physicai science that has had the most effect upon our lives, but in the future physiology and psychology are likely to be far more potent.