After using the app 40 times, users with an average age of 51 were able to read two lines lower on an optical chart held 40cm from their face – a reduction in "eye age" from 50.5 to 41.9 years.

在使用了四十次之后，那些平均年龄在51岁的使用者能够读出距脸部40cm的视力表中下面两行的内容。 可以说，眼睛意义上的年龄已经从50.5岁减少到了41.9 岁。

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On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.

发现在它们的红移、光学光度以及平均光学- X射线谱指数的直方分布图上，X射线选择类星体统计上都分布在这些参数图的低端。

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This paper describes the signal characteristic in optical fiber communication systems, and the way to set the signal levels appropriately for the minimum average error rate.

本文阐述光纤数字通信中部分响应信号的特点，和适当地设置信号电平使平均误码率达到最小的方法。

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You're also getting a 2.5-inch LCD, VGA video at 30fps, and 16MB of onboard memory, plus, the few downsides here don't sound all that bad: below average life from the included rechargeable battery, only six steps on the optical zoom, and an Exposure Compensation setting that doesn't auto-reset are the only gripes this reviewer had.

ENGADGET: Fuji's six megapixel Finepix F470 reviewed