• echelon

    echelon

    echelon是什么意思 n. 梯形, 梯阵, 梯次编队vt. 排成梯队vi. 形成梯队 n. a body of troops arranged in a linen. a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset echelon的用法和例句: 1. Now, we're...

    2025-07-27
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