曝光指数 Exposure index 考虑适当曝光时，作为胶片感度目标的数字，实际应用时，以AS100,JIS100的值表示。 闪光灯的曝光指数是固定的 GN是闪光灯的指数
结果：得到了曝光指数变量方程和杠杆平衡原则。
Results: Develop an exposure level principle and create an exposure dial.
ASA曝光指数∶由美国国家标准学会规定，标明胶片对光的敏感程度的指数或感光速度。
ASA Exposure: Index or speed rating that denotes the film sensitivity, defined by the American National Standards Institution.
该公司的股份表现糟糕，在过去12个月里其下跌速度为道琼斯可持续性媒体指数的两倍，大部分归咎于目前行情惨淡的印刷媒体对其进行的高曝光率。
The firm's shares have performed badly, falling twice as fast as the Dow Jones Stoxx media index over the past 12 months. That is mostly due to its high exposure to print media, which is struggling.
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