新型电动汽车的推出在环保人士中引发了热烈讨论。

The ___introduction of the new electric car sparked lively discussions among environmentalists.

这本书的引言简要介绍了作者的创作背景。

The ___introduction of this book briefly explains the author's background.

她为两位陌生人做了相互介绍。

She made the ___introduction for the two strangers.