Electromagnetic describes something that has to do with both electricity and magnetism at once, or that has both kinds of quality. Light, radio waves, X-rays, and microwaves are all electromagnetic waves: they are not “just electric” or “just magnetic.” You also hear electromagnetic field around power lines, phones, and motors.

Electromagneticelectromagnetic（電磁的） describes something用來形容某個東西 that has to do with both electricity and magnetism at once同時跟電和磁都有關 or that has both kinds of quality或同時具備這兩種性質 Light, radio waves, X-rays, and microwaves光、無線電波、X光和微波 are all electromagnetic waves都是電磁波 they are not "just electric" or "just magnetic."它們不是「只有電」或「只有磁」 You also hear electromagnetic field你也會聽到electromagnetic field（電磁場） around power lines, phones, and motors出現在電線、手機和馬達周圍

It is a science and technical adjective; news stories use it when they talk about radiation or wireless signals.

It is它是 a science and technical adjective一個科學、技術性的形容詞 news stories新聞報導 use it when they talk about radiation or wireless signals在講輻射或無線訊號時會用它

Though actually, people sometimes say electromagnetic when they only mean “electric” or only mean “a magnet,” which is looser than a physics teacher would like. The careful use keeps both sides in the word.

Though actually不過其實 people sometimes say electromagnetic有時候人會說electromagnetic when they only mean "electric"其實只是想講「電的」 or only mean "a magnet,"或只是想講「磁鐵」 which is looser than a physics teacher would like這用法比物理老師希望的還鬆散 The careful use嚴謹的用法 keeps both sides in the word會同時保留「電」跟「磁」這兩邊的意思