他意识到，从不同的纬度上看，行星穿过太阳圆盘的路径似乎会不一样。

He realized that, from different latitudes, the passage of the planet across the Sun's disc would appear to differ.

youdao

奖章圆盘的正面是阿拉斯泰尔·坎贝尔。

The face on the metal disc is that of Alastair Campbell.

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取这个圆盘的平面。

So you take the plane of the disk.

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Moving a stack of size 3, again, if I want to go over there, I need to make sure I can put the spare one over here before I move the bottom one, I can't cover up any of the smaller ones with the larger one, but I can get it there.

移动上面的三个圆盘的话，我在移动最底下的圆盘之前，同样要确保剩下的,是在另外一个柱子上，因为我不能把大的圆盘,放在小的上面。

麻省理工公开课 - 计算机科学及编程导论课程节选

Stack of size 4, again I'm going there, so I'm going to do this initially, no I'm not, I'm going to start again.

同样的，移动上面四个圆盘，同样也是。

麻省理工公开课 - 计算机科学及编程导论课程节选

OK, that's not so bad. Moving a stack of size 2 if I want to go there, I need to put this one temporarily over here so I can move the bottom one before I move it over.

好，并不那么难，移动上面两个圆盘的话2,我需要把最小的盘子，临时先放到多余的柱子上来,这样才能在把它移过来之前,把最底下的盘子放到目标柱子上。

麻省理工公开课 - 计算机科学及编程导论课程节选