该系统已经在马萨诸塞州剑桥测试过，那里的交通灯是由一套固定模式。

The system was tested in Cambridge, Massachusetts, where traffic lights are on a set pattern.

youdao

该系统已经在马萨诸塞州剑桥测试过，那里的交通灯是由一套固定模式。

The system was tested in Cambridge, Massachusetts, where traffic lights are on a set pattern.

youdao