登到山坡的一半时，我摇摇晃晃的停下来，呼吸稀薄的空气，这时，距离我能够理解爱因斯坦或狄拉克的方程式的高度还相差很远。
Midway up the slope , however , I staggered to a halt , gasping in the rarefied air , well before I reached the heights where the equations of Einstein and Dirac would have made sense .
狄拉克方程式