The students showed great interest after the professor gave a brief introduction to the course.
教授简单介绍了这门课程之后，学生们表现出极大的兴趣。
It's a useful introduction to an extremely complex subject.
这是对一门极为复杂的学科的有益入门教程。
This album was my first introduction to modern jazz.
这张专辑唱片让我初次接触了现代爵士乐。
On balance, the book is a friendly, down-to-earth introduction to physics.
总而言之，这是一本通俗而务实的物理入门书。
Ecuador provides a perfect introduction to South America; it's a continent in miniature
厄瓜多尔是认识南美洲的绝佳切入点，它是南美大陆的缩影。