SQT: Megabytes and Megabits SQT ：和兆兆字节

There’sa big difference between megabits and megabytes and again between those and megabps, so watch out when you’re buying memory, storage or bandwidth.还有很大差异和兆兆位，并再次与那些和megabps ，所以观看时，你买的内存，储存或带宽。

From first principles, a bit, is a binary digit, a single 1 or a 0 in binary code.从第一原则，位，是一个二进制数字，一个1或0的二进制代码。 A byte is a word composed of 8 bits, so a byte is 8 times as big as a bit.字节是一个词组成的8位，所以一个字节是8倍大一点。 A megabit is “approximately” a million bits, whereas a megabyte is a million bytes, or eight megabits; that’s storage space.阿兆位的是“大约” 100万位，而一个字节是一个百万字节，或8兆;这是存储空间。 Megabps in turn is a million bits per second; that’s transfer rate. Megabps又是一个万比特每秒，这是传输速率。

So, if you’ve got an 8Mbps (Megabits per second) connection then you’re going to be able to download one megabyte of information per second at full speed, although that rarely happens.因此，如果您有8Mbps的（兆位每秒）连接然后你将能够下载一个字节的信息每秒全速，但很少发生。 A 4 minute song is usually compressed as an mp3 to 5 megabytes, so you’d expect that to take about 5 seconds to download, at fullspeed.阿四分钟歌曲通常是压缩作为一个MP3到5兆字节，所以你期待这大约需要5秒钟下载，在fullspeed 。 A whole album of ten tracks at around 5 megabytes each should therefore take less than a minute to download at that rate.整个专辑的10首歌曲约5兆字节，因此每不到一分钟下载该利率。

When you move on to movie downloads you’re usually talking 700 to 1000 megabytes, which is around one gigabyte (giga meaning million), you can do the calculations yourself on download times.当你进入电影下载通常你说话700至1000兆字节，这是约1千兆字节（千兆含义万美元） ，你可以计算自己的下载次数。 For more on the many other size prefixes check out the sciencebase post on欲了解更多关于其他许多大小前缀查看sciencebase职位 zepto, yotta, and yocto zepto ， yotta ，并yocto . 。

Of course, ADSL and cable broadband speeds varying depending on load, time of day, distance from your exchange and whether you’re connection is capped or当然， ADSL和有线宽带速度取决于不同的负荷，时间，距离，您的交流和您是否连接的上限或 throttled扼杀 . 。