1.最重要的，首要的，主要的
2.起支配作用的，有控制力的
3.在中心的，中央的
4.容易到达的，交通方便的，四通八达的 词形变化
- 副词 centrally
- used in the description of a place that in the middle of another place
- a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication
- serving as an essential component
- in or near a center or constituting a center; the inner area
- centrally located and easy to reach