He taught mathematics for many years.

他教数学已很多年了。

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He taught mathematics on the university level and developed a system for calculating longitude while at sea.

他教授大学数学并且创制出一个用于海上计算纬度的体系。

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By the time he was fourteen years old, he had taught himself advanced mathematics from textbooks.

到十四岁的时候，他已自学了课本上的高等数学。

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Katz was previously an adjunct professor of statistics at the Stern School of Business at New York University, where he taught classes in business mathematics applications.

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