那场讲座是我对哲学的第一次接触。

That lecture was my first ___introduction to philosophy.

这门课程是你对计算机编程的第一次接触。

This course is your first ___introduction to computer programming.

他参观博物馆是他第一次接触现代艺术。

His visit to the museum was his first ___introduction to modern art.