一天，伽利略偶然听了一位数学教授讲的几何课程。
One day, Galileo happened to hear a mathematics professor teach a class about geometry.
小学几何课程如何培养学生的空间观念是备受关注的问题。
How to develop student's spatial sense by geometry curriculum is drawing more and more attention.
例如，数学老师或者数学系有2个代数课程和两个几何课程。
For example, a math teacher or department has 2 algebra and 2 geometry courses.
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