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old age dependency ratio
old age dependency ratio
英
[old age dependency ratio]
美
[old age dependency ratio]
中文释义
扶老比
单词分析
单词结构:
old age dependency ratio
字母数:24
记忆提示
🎯 重点记忆:
单词拼写:old age dependency ratio
核心含义:扶老比
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更新时间:2026-02-02 03:45:00