Each behavior does not have its own independent circuit. 不是每種行為都有它自己的獨立的迴路。
This kind of lighting system was one in which lights were connected in a series circuit, so if one failed, the whole circuit failed. 這種照明系統是把光源連結到一圈一圈的迴路之上，所以如果有一個循環壞掉了，那麼整個設備也壞了。
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