A place in the electricity network where power is taken from the high-voltage lines coming from the power station and changed to a lower voltage, so that it can be sent on to homes, shops and factories. Electricity travels long distances at very high voltage, which is efficient but far too dangerous for a house; the substation is the halfway point where that voltage is stepped down and the current is switched and directed.

A place in the electricity networksubstation是電力網路裡的一個地方 where power is taken from the high-voltage lines coming from the power station從發電廠來的高壓電線在這裡把電拿出來 and changed to a lower voltage轉成比較低的電壓 so that it can be sent on to homes, shops and factories這樣才能送到住家、商店和工廠 Electricity travels long distances at very high voltage電力長距離傳輸時電壓非常高 which is efficient but far too dangerous for a house這樣比較有效率，但對一般住家來說太危險了 the substation is the halfway point where that voltage is stepped down and the current is switched and directedsubstation就是中間那個把電壓降下來、把電流切換和導向的地方

You have almost certainly walked past one: a fenced yard full of grey metal towers and thick insulators that hums, or a small locked brick building on the corner of a street, usually with a warning sign about high voltage.

You have almost certainly walked past one你一定曾經路過一個substation a fenced yard full of grey metal towers and thick insulators that hums一個圍起來的院子，裡面滿是會發出嗡嗡聲的灰色金屬塔和粗粗的絕緣礙子 or a small locked brick building on the corner of a street或者是街角一棟上鎖的小磚房 usually with a warning sign about high voltage通常還會有一個高壓警告標誌

It is a countable noun, and you will meet it in the news whenever there is a blackout, because a fault at a substation can leave a whole district dark. The word is also used, less often, for a small branch office of a larger organisation — a police substation, for instance — but the electrical meaning is the usual one.

It is a countable noun這是一個可數名詞 and you will meet it in the news whenever there is a blackout只要停電，你就會在新聞裡看到它 because a fault at a substation can leave a whole district dark因為substation出問題可能會讓整個地區都陷入黑暗 The word is also used, less often, for a small branch office of a larger organisation這個字有時候也會用來指比較大的組織底下的小分部 a police substation, for instance例如police substation（分駐所） but the electrical meaning is the usual one但電力方面的意思才是最常見的