Echelon
01
درجة, شبكة انعراج درجة
a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
02
صف مائل, تشكيل صف مائل
a diagonal formation of things, especially used in military troops
03
مستوى, رتبة
a level or rank in an organization, profession, or society, indicating a person's status or authority within that hierarchy
أمثلة
His promotion moved him into the top echelon of academic researchers in his field.
ترقيته نقلته إلى الطبقة العليا من الباحثين الأكاديميين في مجاله.
