[الغيمة الصافية]

السلام عليكم
اريد ترجمة المقطع التالي بشكل واضح ولكم الشكر
The matrix element S and the corresponding cross sections fluctuate rapidly with
energy. The energy-averaged quantities may similarly be described by an average
matrix element (S), where the angular brackets represent averaging over an energy
interval larger than the mean width of the underlying resonances