编著一个方法，用以预示一行字符。
我们不必添加一个新行字符，如果这样做了，测试就会失败。
We have not added a newline character; if we did, the test would fail.
它构建了一行字符串，该字符串包含从root到当前行的所有元素。
It builds a string containing all elements from the root to the current row.
如果打开这个文件，您可以为每个字符都找到一行说明。
If you open this file, you'll find a line for each character.
最后一行确保返回的第一个字符是小写的。
The last line handles making sure the first character of the returned string is lowercase.
模式n：使点匹配任何字符，包括新行。
Mode n: Make the dot match any character, including new lines.
请注意继续字符(\)；该字符可允许代码运行到下一行。
Notice the continuation character (\); it allows the code to run to the next line.
但是，只有这两个字符串出现在同一行上，这个命令才认为是匹配的。
However, this command will only find matches where both strings exist on the same line.
这一行输出元素的字符串值而不是整个元素。
This line outputs the string-value of the element, not the entire element.
这个输出的第一行必须包含字符串1 . .。
一行上的字符数不应该超过80个。
最后一行给出了特定字符串类型的属性。
行键是表的主键，通常是一个字符串。
The row key is the primary key of the table and is typically a string.
最后，将前面一行返回的字符串写到响应中。
Finally, the string that was returned in the previous line is written to the response.
一行上的字符数不应该超过80个。
将打印除了包含字符串spider之外的所有行。
Prints every line except those that contain the string spider.
将字符串放入状态行以提供一些反馈。
Put the string into the status line to give us some feedback.
在此之后，字符串的地址usort_str被压入堆栈(第30行)。
After this, the address of the string usort_str is pushed onto the stack (line 30).
单字符的command是要对指定行执行的操作。
The single-character command is the action to perform on the specified lines.
该函数的每次调用都应该返回输出的其中一行作为字符串。
Each call to the function should return one line of input as a string.
通常，这些字符在每行的行首或行末锚定模式。
Normally, those characters anchor the pattern at the beginning, or the end, of each line.
源代码的一个物理行中最多只能有 65535 个字符。
There is a maximum of 65535 characters in a physical line of source code.
每条愿义字符串在每一行中只输出一次。
如果前导字符长度太长，与整个区域明显不适应，那么它将会令起一行。
If the leader's length is too long to fit in the area, the leader will begin a new line.
写功能向第0行里面写入一个字符串。
Write writes a generated string into row 0 of the last created table.
写功能向第0行里面写入一个字符串。
Write writes a generated string into row 0 of the last created table.
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