人类心智发展三阶段说 three stages of the progress of the human mind; the law of the three stages
马克思主义发展三阶段论 three stages of the development of Marxism; three major stages of development through which Marxist theory has passed
第三阶段 The third stage ; Phase III ; Phase The Third The Rally ; level iii
三阶段层级结构模型 three order-hierarchy models ; hierarchy models
三阶段设计 three-step design ; three-phase design
卡昂大学第三阶段 DESS
第三阶段蠕变 tertiary creep
三阶段考试 Level III
三阶段治疗 three phase therapy
第二阶段仍然是测试疫苗的安全性，但主要是检测疫苗是否有效。如果第二阶段进展顺利，疫苗研发就可以开始第三阶段。
Phase 2 still tests the vaccine's safety, but it's mainly a test to see if the vaccine seems to work. If Phase 2 goes well, the vaccine can begin Phase 3.
从1991年3月到1993年3月，第三阶段的重点是对这些活动做精细的改进并且使其制度化。
Phase III, from March 1991 to March 1993, focused on the refinement and institutionalization of these activities.
明斯基将该过程划分为三阶段。
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