Students were confused to see that there was just a black dot in the center of the page.

看到页面中心只有一个黑点，同学们很困惑。

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As a person becomes active and "speaks" (types), their dot moves closer to the center; when their activity ceases, their dot moves closer to the outside over time.

随着某些人变得活跃并进行“发言”(类型)，那么他们的小点将会向中心移动；当他们的活动停止时，他们的小点将会逐渐向边缘移动。

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The lander set down on the moon by Buzz Aldrin and Neil Armstrong in 1969 is at the center of this image, a small white dot [arrow] with a long shadow stretching to the right.

1969年由巴兹·奥尔德林和尼尔·阿姆斯特朗设置在月球上的着陆器位于这张图像的正中心，一块儿很小的白点（箭头所指处）。

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And you see that the dot intensity grows as you get closer and closer to the center.

点的密度随着到中心的距离,缩短的变密。

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