我在哈佛大学主修汉语时，高等数学仅仅是一门选修课，所以我根本不懂高等数学。

I know nothing of advanced mathematics, which was offered as an optional course when I majored in Chinese at Harvard University.

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本文着重介绍了数学实验课的教训内容和方法，并详细分析了数学实验选修课的教学实践情况。

The article focuses on the teaching contents and methods experiment course and analyzes the teaching conditions of selective maths experiment course in detail.

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我本来阅读的是戏剧专业。但是在选修课的时候我选了数学。后来我既然发现我其实特别喜欢数学，我也喜欢与搞科技类职业的人交往。

I was originally a theater major but by branching out and taking a math class I discovered I actually liked math, and I enjoyed hanging out with technical people.

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