hallmark(such confusion was the hallmark of a chaotic day in which almost every figure and fact seemed subject to recall or, in the worst case, manupulation to suit the moment's needs Olga Okuneva)
outstanding feature(Regular fenestration, flat roofs and ornamented, heavily bracketed cornices are outstanding features of this style. • Зато выяснили ценную деталь: потерпевший вспомнил, что на пальцах Деда Мороза есть синие наколки — отличительная черта не раз побывавших за решёткой уголовников. (из рус. источника)ART Vancouver)
differentiating feature(The primary differentiating feature of the BlueArc's NAS products in comparison to their competition is BlueArc's heavy reliance on FPGA's, or field ... WK. Finally, another differentiating feature of the app is its ability to sync with the Mac desktop app which makes it a must-have. | a differentiating feature of the invention is the use of a device, process or material Alexander Demidov)
