البحث
إكتشاف أشخاص جدد وإنشاء اتصالات جديدة وصداقات جديدة
made less in size or amount or degree
made less in size or amount or degree
a change downward
a change downward
a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber