The happiest teens used digital media a little less than an hour per day.

最快乐的青少年每天使用数字媒体的时间略少于一小时。

Smith used mail coaches to travel as much as 10,000 miles per year.

史密斯使用邮车旅行每年多达1万英里。

Apple DOS 3.1 disks used 13 sectors of data per disk track.

苹果 DOS 3.1 每个磁盘条使用13个扇区的数据。

For this test we used only two disks, one disk per instance.

对于该测试，我们仅仅使用两个磁盘，每个实例一个磁盘。

Although the amount of memory used per thread is quite small, for an application with several hundred threads, the total memory use for thread stacks can be large.

虽然每个线程使用的内存量相当少，但对于拥有几百个线程的应用程序，线程栈的内存使用总量会达到很高。