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。
However, its deficiency in theoretical frame and original technical flat leads to many problems such as serious "information island", stiff structure, bad modularization, short life circle, and so on.
但由于理论框架和原有技术平台的不足，决策支持系统目前面临“孤岛现象”严重、结构僵硬、模块化差、生命周期短等问题。
The opening process of the circle flat parachute with the differential size and the differential vent position of the canopy by the steady flow wind tunnel were dynamic tested.
在改变伞衣面积和透气量的情况下，在定常风洞中对小型平面圆形伞的开伞过程进行了动态试验，研究了开伞过程中伞衣形状和伞衣所受载荷之间的动态关系。
We went down to the river and put a circle of flat stones on a patch of sand.
我们去到河边的沙滩和把平整的石块围成一圈。
The results indicate that flat-top beam shaping and single-circle beam shaping at the focal plane can all be realized by using three-zone annular phase pupil filters.
模拟结果表明，利用三环相位光瞳滤波器，不仅可以在焦面上实现光强的平顶分布，而且还可以得到单环衍射光束。
The results indicate that flat-top beam shaping and single-circle beam shaping at the focal plane can all be realized by using three-zone annular phase pupil filters.
模拟结果表明，利用三环相位光瞳滤波器，不仅可以在焦面上实现光强的平顶分布，而且还可以得到单环衍射光束。
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