The speech was full of ad-libs and witty asides.

讲演中满是即兴之词和诙谐离题之语。

Loretta's mind went off at a tangent .

洛蕾塔的思想突然离题。

His account of the fire accident includes a lot of extraneous details.

失火事件的描述含有大量离题的细节。

Your remarks are far afield.

你的话离题太远。

Don't wander from the subject.

要离题。

Don't stray from the point.

要离题乱扯。

This is meant to be a discussion course.One factor that will legislate against this aim is the instructor's digressive wordiness.

这表示本课程将以讨论的方式进行，标的原因之一，是为避免本人讲课聒噪，常离题的情况。