中心

1. Origins, structure, and basic meaning

• Structure: 中心（ちゅうしん） names a central position or the main focus of several things.
• Basic usage: It can describe the location of a clock tower or the issue mainly discussed at a meeting.

2. Common pitfalls and similar expressions

• Location and topic
  • 広場の中心に locates something in the middle of a square. 環境問題を中心に makes environmental issues the main topic.
• The scope of a focus
  • を中心に identifies the emphasis. It does not also assert that no other topics were discussed.