introduction可数吗?

introduction的复数形式为introductions，introduction为可数名词。例句She was punctilious in the matter of introductions.她在介绍别人时总是举止得体。

The book is a friendly, down-to-earth introduction to physics.

这是一本简明、实用的物理学入门书。

By way of introduction , let me give you the background to the story.

作为引言，我先来介绍一下故事的背景。

The camera has undergone only two minor tweaks since its introduction.

这款相机自推出以来只经过两次小的改进。

Pay attention to introductions.

注意听介绍。

The first of these is introductions.

第一个规则就是简要介绍。