我们将使用- m选项，该选项以兆字节为单位显示值，还有- o选项，该选项忽略缓冲区信息，以便显示更多的输出。
We will be using the options -m, which displays the values in megabytes, and -o, which suppresses buffer information, allowing a more readable output.
对比不统一的单位时提供更多信息。
Extra information when comparing incompatible units (e.g. "ergs vs. newtons")
对于大学生来说，训练快速阅读的能力，实现在单位时间里从书刊中获取更多有用的信息，已为信息时代的要求所必然。
To college students, it is inevitable in the information ages to practice their ability of fast reading and realize the fact that they can get more useful information from books in unit time.
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