演讲者在谈论气候变化时，突然插入了一段关于他最近旅行的题外话。

The speaker made a brief ___digression about his recent trip while discussing climate change.

我们的旅行因为绕道去参观一座古堡而偏离了原定路线。

Our trip took a slight ___digression when we detoured to visit an ancient castle.