高级阶段；后期阶段
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高级阶段；后期阶段；高级阶段；后期阶段
The later or most developed phases of a process, condition, or activity.
The disease is often easier to treat in its early stages than in its advanced stages.
这种疾病通常在早期阶段比在高级阶段更容易治疗。
高级阶段；后期阶段
The later or most developed phases of a process, condition, or activity.
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