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echelon (grating)
echelon (grating)
英
[echelon (grating)]
美
[echelon (grating)]
中文释义
阶梯光栅
单词分析
单词结构:
echelon (grating)
字母数:17
记忆提示
🎯 重点记忆:
单词拼写:echelon (grating)
核心含义:阶梯光栅
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更新时间:2026-03-20 11:54:59