周末我们计划去海边做短途旅行。

We're planning some beach ___excursions for the weekend.

我们的旅行计划因意外天气而有些变动。

Our travel plans had a few ___excursions due to the unexpected weather.

演讲者在谈论气候变化时，简短地偏离主题讨论了一下新能源技术。

The speaker made a brief ___excursion into renewable energy while discussing climate change.