Mega is an informal word meaning very big, and often impressive or really enjoyable. A mega concert is huge and exciting. A mega house is enormous. You can also put it in front of an adjective — mega famous, mega rich — to mean 'extremely'.

MegaMega is an informal word是一個口語的詞，meaning very big意思是非常大，and而且 often通常 impressive令人印象深刻 or或 really enjoyable真的很好玩。A mega concert一場 mega concert is huge and exciting又盛大又刺激。A mega house一棟 mega house is enormous超級巨大。You你 can also put it in front of an adjective也可以把它放在形容詞前面——mega famous, mega rich像 mega famous、mega rich——to mean 'extremely'意思是「非常」。

It comes from the prefix mega-, which in science and computers has a strict job: one million (a megawatt, a megabyte).

It它 comes from the prefix mega-來自字首 mega-，which它 in science and computers在科學和電腦裡 has a strict job有一個明確的意思：one million一百萬 (a megawatt, a megabyte)（像 a megawatt、a megabyte）。

In casual speech people used mega as a word on its own. That casual use is especially British, and it was very fashionable in late twentieth-century pop talk. You still hear it, but in careful writing it can sound like slang or advertising.

In casual speech在口語裡，people人們 used mega as a word on its own曾把 mega 當成一個獨立的詞來用。That casual use這種口語用法 is especially British尤其是英式英語，and而且 it它 was very fashionable in late twentieth-century pop talk在二十世紀末的流行語裡很紅。You你 still hear it還是聽得到，but但 in careful writing在正式的寫作裡，it它 can sound like slang or advertising可能聽起來像俚語或廣告用語。

So: in science, mega- is a number. In chat, mega is a feeling — huge, or brilliant.

So所以：in science在科學裡，mega- is a number是一個數字。In chat在聊天裡，mega mega is a feeling是一種感覺——huge龐大，or或 brilliant很棒。