echelons
/ˈeʃəˌlɔnz/
📖 中文释义
🔗 释义中的汉语词
🧩 词形变化
原形 echelon
📘 English Definition（英文释义）
- n. a body of troops arranged in a line
- n. a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset