接读你的信,知道你有努力上进之志,我是何等的欣慰啊!我们要不愿做时代的落伍者,必须专攻一门自然科学。自然科学是开向理想世界去的特别快车,你坐在上面,不要下来,决不致落伍。我现在也打算用我后半生之精力来专攻一门科学。我们同坐这部车儿去吧!从农业文明渡到工业文明,自然科学是惟一的桥梁。小学教师必须拿着科学的火把引导儿童过渡。不懂科学的人,不久便不能做教师 It is gratifying for me to read your letter and know that you are working hard to make progress. If we want to be backward in time, we must specialize in a natural science. Natural science is a special express train bound for the ideal world. When you sit on it, do not go down and never let it fall. I am now going to specialize in science with my later life skills. Let’s go with this car! From agricultural civilization to industrial civilization, natural science is the only bridge. Primary school teachers must take the torch of science to guide children in transition. People who do not understand science can not be teachers soon