华罗庚说过:“科学成就是由一点一滴积累起来的。惟有长时期的积聚才能由点滴汇成大海。”有的朋友说:“由于一个苹果砸到牛顿的头上了,所以他发现了万有引力定律。”还有朋友说:“由于凯库勒做了一个被蛇咬的梦,所以他研究出了苯分子环状结构式。”殊不知,“冰冻三尺,非一日之寒;水滴石穿,非一日之功”。没有一定的科学知识作基础,牛顿即使被苹果砸千百次,也不会发现万有 Hua Luogeng said: “Scientific achievements accumulate in little by little. Only a long period of accumulation can be achieved by driping into the sea.” Some friends said: “Because an apple hit Newton’s head, he discovered that The law of universal gravitation.” Another friend said: “Because Kaikole made a dream bitten by a snake, he studied the cyclic structure of benzene molecules.” As everyone knows, “frozen three feet, not a cold day; It is not a day’s work." Without a certain amount of scientific knowledge as a basis, Newton will not find everything even if he is beaten by the apple for thousands of times.