You can see them on your map, and they really run in strips from north to south.
你们可以在地图上看出来,它们以条状从南至北分布。
That is, until the great archaeological discoveries of the nineteenth and twentieth centuries, which unearthed for us the great civilizations of the Ancient Near East, of which I have drawn a remarkably life-like map ] here on the board: Mediterranean, I always start with the Mediterranean Ocean, the Nile River, the Tigris and the Euphrates.
直到十九至二十世纪,一些重大的考古发现,才让我们了解到,远古近东的文明,我已经在黑板上画了一幅,栩栩如生的地图了:,地中海,我总是从地中海讲起,尼罗河,底格里斯河,还有幼发拉底河。
And it tries to find the shortest way, subject to those constraints, to get from Point A to Point B. And there are many, many other instances of this kind of thing.
然后谷歌地图开始寻找,满足这些条件的从A地到B地最短路径,还有很多这样的例子,明天我们会再复习一遍这些内容。
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