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 .

洛蕾塔思想突然离题了。

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

他对失火事件含有大量离题细节。

Your remarks are far afield.

你话离题太远了。

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.

这表示本课程将以方式进行，设此目标原因之一，是为避免本人讲课聒噪，常离题情况。