而且，自1968年以来，最著名的激进运动都倾向于直接行动，而这些行动不必定是基于很多阅读和理论分析的。
It is also the case that since 1968 the most prominent radical movements have preferred direct action not necessarily based on much reading and theoretical analysis.
总之，竞争对于直接行动阶段的民权运动来说是大有益的，甚至可说是不可或缺的。
In brief, competition among these groups was salutary, indeed essential to the fortunes of the the civil rights movement in its direct-action phase.
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