centre tap

例句：

1. 1. The centre of the city is bustling with activity.
   市中心熙熙攘攘。
2. 2. The point of the compass is marked by a flagpole.
   罗盘的指向处有一个旗杆。
3. 3. The center tap is where the main road meets the side street.
   中心点是主路与侧街交汇的地方。