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关注：1 2013-05-23 12:21

求翻译：After doing more research, Fred has learned that the land that is being lost forms a semicircle. This semicircle is part of a circle centered at (0,0), with the line that bisects the circle being the X axis. Locations below the X axis are in the water. The semicircle has an area of 0 at the beginning of year 1. (Semicircle illustrated in the Figure.)是什么意思？

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After doing more research, Fred has learned that the land that is being lost forms a semicircle. This semicircle is part of a circle centered at (0,0), with the line that bisects the circle being the X axis. Locations below the X axis are in the water. The semicircle has an area of 0 at the beginning of year 1. (Semicircle illustrated in the Figure.)
问题补充：
  • 匿名
2013-05-23 12:26:38
后做更多的研究，弗雷德学到正在消失的土地形成的半圆形。此半圆平分圆的 X 轴的线是居中 (0，0)，一个圆圈的一部分。X 轴下方的位置是在水中。半圆总面积 0 年 1 开头。(半圆图所示）。
 
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