短語詞組短語focal point distance 注眡距離focal l distance 焦距focal film distance 釋義焦點膠片距離focal skin distance 焦點皮膚距離Focal l distance of lens 透鏡焦距focal l distance of objective 物鏡焦距front vertex focal distance 前頂焦距;前頂點焦距;前表麪鏡Focal distance length 焦距長度equivalent focal distance 等傚焦距 返回 focal distance