照片上显示的是大约238公里长223公里宽的一块区域，图片的方向是上北下南。

The image shows an area of about 238 kilometers by 223 kilometers, with north at the top.

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位于北加州干旱高原上建造的艾伦望远镜阵列将天文学家所能探测到信号的恒星系统数量大大地增加了。

The construction of the Allen Telescope Array on an arid plateau in northern California greatly expands the number of star systems from which astronomers could detect signals.

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游客们还可以在这里看到世界上最北的邮局，在这里可以给明信片盖戳，以证明该明信片的持有者已经在北纬79度的地方勇敢地探过险。

The other attraction for visitors here is the world’s most northerly post office, where passports can be stamped to attest that the intrepid bearers have ventured to 79 degrees north.

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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。

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