protective sign
查询英语单词中文释义、音标、发音和例句。
protective sign
英
[protective sign]
美
[protective sign]
中文释义
保护记号
单词分析
单词结构:
protective sign
字母数:15
记忆提示
🎯 重点记忆:
- 单词拼写:protective sign
- 核心含义:保护记号
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更新时间:2026-08-31 23:09:19