一只南美洲亚马逊河流域热带雨林中的蝴蝶,偶尔扇动几下翅膀,两周后可能在美国德克萨斯引起一场龙卷风。原因在于蝴蝶翅膀的振动,导致其身边的空气系统发生变化,并引起微弱气流的产生,而微弱气流的产生又会引起它四周或其它系统产生相应的变化,由此引起连锁反应,最终导致其它系统的极大变化。 A butterfly in the tropical rainforest of the Amazon, South America, occasionally flaps its wings for as little as two weeks and may cause a tornado in Texas, USA. The reason is that the vibration of the butterfly’s wings causes the air system around it to change and cause the faint air flow which in turn causes its surroundings or other systems to change accordingly and thus cause a chain reaction which eventually leads to other Great changes in the system.