在这个距离上，海洋、陆地、白云和冰雪全部被融入一个光斑之中，只是浩瀚的宇宙中的一个小光点而已。
From this distance, oceans, land, clouds, and ice blend into a blur of light, a mere dot against the vastness of space.
研究结果表明，DHEGB光斑随着传输距离发生了旋转，传输特性与离轴参数有密切关系。
The results show that the beam spot of the DHEGB rotates with propagation distance, and the propagation property is closely related to the decentered parameter.
考虑在主轴上放置透明盘片，用PSD测量位移子系统测出放置透明盘片前后的光斑移动距离，就可以计算出光头与主轴马达间的平行度。
Using the transparence CD, PSD can detect the displacement of laser spot between non-placing and placing the CD, and it can be used to calculate the parallelism between optical head and spindle motor.
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