The first chapter introduces the causes meaning characteristics and impact of the ultra-leftist though .

第一章主要是介绍 极左 思潮产生的原因、内涵、特点及影响。

The Ultra-Leftist line was a line that would have wrecked a country ruined the people and led to the destruction of the Party and national subjugation .

极左 路线是一条祸国殃民的路线， 亡党亡国的 路线。