excursion|excursions

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.

周末我们计划去海边做短途旅行。

We're planning some beach ___excursions for the weekend.

演讲者在讨论经济问题时，简短地穿插了一个有趣的历史故事。

During the talk about economic issues, the speaker made a brief ___excursion into an interesting historical story.