A material that lets electricity pass through it with no resistance at all, so no energy is lost as heat — usually only when cooled to a very low temperature. This is the countable noun for the substance itself: a superconductor, two superconductors.

A material一種材料 that lets electricity pass through it with no resistance at all讓電流通過時完全沒有電阻, so沒有 no energy is lost as heat能量以熱的形式流失——usually only通常只有 when cooled to a very low temperature在冷卻到非常低的溫度時才會這樣. This is the countable noun for the substance itself這是指這種物質本身的可數名詞: a superconductora superconductor（一個超導體）, two superconductorstwo superconductors（兩個超導體）.

Certain metals become superconductors near absolute zero; a family of ceramic materials found in the 1980s works at higher temperatures, though still far colder than a freezer, and those are called high-temperature superconductors — 'high' only by comparison.

Certain metals某些金屬 become superconductors會變成超導體 near absolute zero在接近絕對零度時; a family of ceramic materials一類陶瓷材料 found in the 1980s1980年代發現的 works at higher temperatures能在較高溫度下運作, though still far colder than a freezer雖然還是遠比冰箱冷得多, and those are called high-temperature superconductors這些就叫做高溫超導體——'high' only by comparison'高'只是相對而言.

What makes them useful in practice is that you can push a huge current through a superconducting coil and get a very strong magnet without it melting, which is exactly what an MRI scanner and a particle accelerator need.

What makes them useful in practice is它們實際上有用的地方在於 that you can push a huge current你可以把很大的電流推過 through a superconducting coil一個超導線圈 and get a very strong magnet得到一個非常強的磁場 without it melting而線圈不會融化, which is exactly what an MRI scanner and a particle accelerator need這正是核磁共振掃描儀和粒子加速器需要的.

You will also meet the word in news stories, because a superconductor that worked at ordinary room temperature would be a genuinely world-changing discovery, and every few years someone announces one.

You will also meet the word in news stories你也會在新聞報導裡遇到這個字, because因為 a superconductor that worked at ordinary room temperature如果有超導體能在一般室溫下運作 would be a genuinely world-changing discovery那會是真正改變世界的發現, and every few years someone announces one所以每隔幾年就有人宣布發現一個.