中心的

例句：

1. 1.The center of the city is bustling with activity.
   市中心熙熙攘攘，充满活力。
2. 2.The project's main goal is to improve public transportation.
   该项目的主要目标是改善公共交通。
3. 3. The meeting was held at the center of the room.
   会议在房间中央举行。