感光度刻度
/ˈfɪlm ˈspiːd ˈskeɪl/
n
English: film speed scale · 感光度刻度
English · film speed scaleEspañol · escala de sensibilidad de la películaFrançais · échelle de sensibilité du film
释义：Graduated scale that shows the film’s sensitivity to light; it is expressed by the ISO or ASA number, where the higher the number, the more sensitive the film.