electricity的形容詞形式是什么意思

　　Translators can now work from home, via electronic mail systems

　　翻譯人員現在可以利用電子郵件系統在家里工作了。

　　Police keep track of the kidnapper using electronic surveillance equipment.

　　警方利用電子監視設備跟蹤綁架者。

　　The main electricity supply had been sabotaged by the rebels.

　　叛亂者破壞了供電干線。