坑爹。。为什么下载或传输速度只是预期的1/8?

When it comes to throughput measurements, however, both bits  and bytes are used, so you 
have to be careful. Raw throughput values are normally given in  bits per second, but many 
software applications report transfer rates  in bytes per second, including many Web 
browsers and FTP client programs. This often leads to users wondering why they are only 
getting one eighth of their expected download  or transfer speeds.