a speech, especially one that is long and spoken quickly and is intended to persuade the person listening about something

a sales spiel 滔滔不绝的推销游说

They gave us a long spiel about why we needed to install double glazing in our house. 他们滔滔不绝向我们大讲了一通为什么我们的房子需要装双层玻璃窗。

Synonym: patter