青霉素,是六十几年前由英国细菌学家弗莱明发现的,它使许多先前不能治愈的疾病可能被治愈,使医疗水平产生了飞跃。 这一发现特别富有戏剧性。1928年,弗莱明无意中把一块带有细菌菌落的培养皿放在窗台上。时过不久,一种普通的绿霉菌穿过打开的窗子,飞落在培养皿中,仔细观察,细菌死亡了。通过分析,弗莱明发现被霉菌污染的周围有一种能杀灭或防止细菌生长的物质, Penicillin, discovered more than sixty years ago by the British bacteriologist Fleming, has caused many previously incurable diseases to be cured and led to a leap in medical care. This discovery is particularly dramatic. In 1928, Fleming inadvertently placed a petri dish with bacterial colonies on the window sill. Shortly afterwards, an ordinary green mold passed through the open window and flew in the petri dish. After careful observation, the bacteria died. Through the analysis, Fleming discovered that there is a substance that is contaminated by mold and can kill or prevent the growth of bacteria.