Gōngrén jiējí zài gémìng zhōng fāhuī le zhòngyào zuòyòng.
The working class played an important role in the revolution.
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history
阶级 is a key term in Marxist theory and was heavily used during China's revolutionary period. Common collocations: 阶级斗争 (class struggle), 阶级矛盾 (class contradictions).