Each behavior does not have its own independent circuit. 不是每种行为都有它自己的独立的回路。
This kind of lighting system was one in which lights were connected in a series circuit, so if one failed, the whole circuit failed. 这种照明系统是把光源连结到一圈一圈的回路之上，所以如果有一个循环坏掉了，那么整个设备也坏了。
