A megabyte is a unit for measuring how much computer information something is — roughly a million bytes. It is written MB.

A megabyte is a unit for measuring how much computer information something isMegabyte是用來量電腦資訊有多少的一個單位， roughly a million bytes大概一百萬個位元組， It is written MB就寫成MB。

A byte is eight bits, and one byte holds about one letter of plain text, so a megabyte is around a million letters: a long book in plain text, one decent photo, about a minute of music. It is the unit people reach for when talking about the size of files, photos, apps, and mobile data allowances.

A byte is一個byte是 eight bits八個bit， and one byte holds about one letter of plain text一個byte大概裝得下純文字的一個字母， so a megabyte is around a million letters所以一個megabyte大概是一百萬個字母： a long book in plain text純文字的一本厚書、 one decent photo一張還不錯的照片、 about a minute of music大概一分鐘的音樂。 when talking about the size of files, photos, apps, and mobile data allowances談到檔案、照片、app、行動數據用量的大小的時候， It is the unit people reach for這是大家會用的單位。

Here is the messy part, and your students will meet it. Strictly, in the way computers count, a megabyte is 1,024 kilobytes (1,048,576 bytes), because computers count in twos, not tens. But hard-drive and phone companies often use the round one million instead, because it makes their number look bigger.

Here is the messy part接下來是比較亂的部分， and your students will meet it你的學生一定會遇到。 Strictly, in the way computers count嚴格來說，照電腦計算的方式， because computers count in twos, not tens因為電腦是用二進位算的，不是十進位， a megabyte is 1,024 kilobytes (1,048,576 bytes)一個megabyte是1,024個kilobyte（1,048,576個bytes）。 But hard-drive and phone companies often use the round one million instead但硬碟和手機公司常常改用整數的一百萬， because it makes their number look bigger因為這樣數字看起來比較大。

Both uses are out there, which is why a '500 GB' drive shows up on your computer as something less. Some people write MiB (mebibyte) for the strict 1,024 version to keep the two apart, but almost nobody says that out loud.

Both uses are out there這兩種用法都存在， which is why a '500 GB' drive shows up on your computer as something less所以你會看到標榜「500GB」的硬碟，接到電腦上顯示的容量卻比較少。 Some people write MiB (mebibyte) for the strict 1,024 version有些人會把嚴格的1,024版本寫成MiB（mebibyte）， to keep the two apart為了把兩者分開， but almost nobody says that out loud但幾乎沒有人會這樣講出口。

In everyday speech the megabyte now feels small — phones and files moved on to gigabytes long ago — so you meet it mostly for photos, documents, and email limits.

In everyday speech在日常說法裡， the megabyte now feels smallmegabyte現在感覺很小 phones and files moved on to gigabytes long ago——手機和檔案早就進到gigabyte的時代了—— so you meet it mostly for photos, documents, and email limits所以你大概只會在照片、文件和信箱容量限制上遇到它。