ASA Exposure: Index or speed rating that denotes the film sensitivity, defined by the American National Standards Institution.

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。

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ASA Exposure: Index or speed rating that denotes the film sensitivity, defined by the American National Standards Institution.

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。

youdao