For example, a typical email system might contain 100 instances of the same one Megabyte (MB) file attachment.

例如，一个典型的电子邮件系统可能包含的100相同，1兆字节的实例(字节)文件附件。

youdao

When SD was introduced 10 years ago, it came with now-laughable 8 megabyte (MB) capacity.

FORBES: Betamaxed: Sony Flushes Its Flash Card Down the Memory Hole

Matsushita's projections say today's 64-megabyte memory cards will double in size to 128 MB next year, but these will be enough to hold just a few minutes of video.

CNN: ASIANOW - TIME Asia | Phone Wars: Episode 3G