在漫长的讲座中，我的思绪常常走神。

During long lectures, ___my ___thoughts often ___wander.

每当他试图专注于枯燥的文书工作时，他的思绪就会走神。

___His ___mind ___wanders whenever he tries to focus on boring paperwork.

在安静的房间里，她的注意力很容易飘到遥远的回忆上。

In a quiet room, ___her ___attention easily ___wanders to distant memories.