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back-up safety device
back-up safety device
英
[back-up safety device]
美
[back-up safety device]
中文释义
后备安全设备
单词分析
单词结构:
back-up safety device
字母数:21
记忆提示
🎯 重点记忆:
单词拼写:back-up safety device
核心含义:后备安全设备
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更新时间:2026-01-30 20:50:17