The eye can accommodate itself to seeing objects at different distances.

眼睛能自动调节便观看远近不同的景。

In micrographics, a measure of the remoteness of the copy from the original material, the first microfilm representation being the first generation microfilm.

微照相技术中，量副本离原始资料远近的程。第一次微后的胶片为第一代微胶片。