天文单位是宇宙的标尺，是我们今天测量宇宙的基础。
The AU is a cosmic measuring rod, and the basis of how we scale the Universe today.
你可以使用 Page Up 和Page Down 键来以帧为单位移动时间标尺，另外，如果想要更快移动，加按Shift。
Also to refine that you can use the Page Up and Page Down keys to move frame by frame within the timeline, and adding shift to the mix moves you 10 frames either way.
时间轴顶端的标尺会指出时间，单位为秒（与秒数的各部分）。
The header at the top of the Timeline indicates time in seconds (and parts of seconds).
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