For the purposes of this article, I will demonstrate distances using the flat-Earth model and the great-circle distance and leave the rest to you to explore.
但是为了实现本文的目的，我将使用平面地球模型和大圆弧长距离来演示距离，其他方法留给读者探索。
We timed it - it takes less than 10 seconds to form a flat circle and throw it on the grill!
我们可以算算时间—不用10秒就做成一片并放入烤炉了！
He tugged at the thin ropes, and nearer and nearer came the circle of flat corks, and the net rose at last to the top of the water.
他继续拽那细绳，扁平的软木浮圈越来越近，终于，渔网升出了水面。
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