北极圈在12月份，在地平地线之上是看不到太阳的。

At the Arctic Circle, the sun cannot be seen above the horizon in December.

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在起伏的山地上铺设良好的道路变成了平地上坑坑洼洼，尘土飞扬的道路，而山却总是远在地平线上。

The well-paved surfaces and rolling hills became flat, dusty, pot-holed roads, with mountains never closer than the horizon.

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也就是在水平地的中央竖一根与地平面垂直的木杆，从日出到日没，天天的连续观影。

That is, the level of the central shaft with a wooden vertical horizon, from sunrise to Sunset every day of continuous viewing.

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