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back-up sand
back-up sand
英
[back-up sand]
美
[back-up sand]
中文释义
[机] 背砂
单词分析
单词结构:
back-up sand
字母数:12
记忆提示
🎯 重点记忆:
单词拼写:back-up sand
核心含义:[机] 背砂
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更新时间:2025-12-08 07:11:23