这段代码接受来自用户的受感染数据，检查要打印的字符只有字母和数字字符以及空格符，以此来提供安全保护。
This piece of code takes up tainted data from the user, ensuring protection as it checks that the characters to be printed are only alphanumeric characters and Spaces.
我已去掉了创建文档的归属权，你可以打印，所以你可以容易地填空格。
I've taken the liberty of creating a document you can print so you can easily fill in the blanks.
这使print语句打印字符值时后面跟着空格字符，而不是换行字符。
This makes the print statement print out the character value, followed by a space character instead of a newline character.
如果打印一个map，您可以看到map项之间的逗号，但这些逗号纯粹是为了可读性而添加的；在Clojure中，逗号将被作为空格处理。
If you print a map you'll see commas between map entries, but it's purely for readability; commas are treated as whitespace in Clojure.
出于教学目的，我们把此任务分在三个线程中：一个线程打印人名，一个线程打印空格，一个线程打印姓和一个新行。
For educational purposes, we've split this task among three threads: one prints the first name, one prints a space, and one prints the surname and a new-line.
如果要对齐文字列，应该用表格而不是空格。如果您使用空格，文字在打印时可能会不整齐。
To line up columns of text use tables instead of spaces. if you use Spaces your text might not line up when printed.
也就是说，开始在纸上打印表格，上面留有空格需要填写数字或是其他信息。
That is, there would be a printed form on paper with spaces to fill in the numbers or other things.
当两个词能够形成一个组合(具有给定的字母)时，这两个词应该打印到同一行，两个词中间用一个空格隔开。
When a combination of two words can be formed with the given letters, the words should be printed on the same line separated by a space.
当两个词能够形成一个组合(具有给定的字母)时，这两个词应该打印到同一行，两个词中间用一个空格隔开。
When a combination of two words can be formed with the given letters, the words should be printed on the same line separated by a space.
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