这一点在前面一段里已经交代过了。

This point has been dealt with in the preceding paragraph.

youdao

这里是方法跟踪输出的一个示例(用前面一段的第二个命令行)。

Here is a sample of method trace output (using the second command line from the previous section).

youdao

使用tr很简单：使用前面一段中所给出的符号表示法，用一个字符去替换出现的所有另一个字符。

Using tr is simple: to replace all occurrences of one character with another, use the notation shown in the previous paragraph.

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