n. some situation or event that is thought about
n. 主题, 论题, 话题
1. The topic of our discussion today is climate change.
我们今天讨论的主题是气候变化。
2. She chose a fun topic for her presentation.
她为她的演讲选择了一个有趣的主题。
3. It's important to stay on topic during the meeting.
在会议期间保持主题是很重要的。