Stereographic projection is known since the antiquity and was originally known as the planisphere projection.
立体绘图法原称为星座盘投影法。
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Today she had come back in a great state of excitement, from the picture-gallery, whither she had taken her boys, just as she had conducted them all to a museum every Thursday in years gone by, and explained everything to them.
今天,先生是领了本级的学生去
绘图展览会,回去的时候转到我们这里来的。我们在先生那一班的时候,每逢
期二,先生常领我们到博物馆去,把种种的东西说明给我们听。