不允许在变量名内部使用百分号。
注意，大多数元素包括用百分号(%)分开的值。
Notice that most elements include values demarcated by percent signs (%).
这表示某些字符可能被替换为百分号(%)后跟特定的数字。
This means that certain characters may be replaced with a percent sign (%) followed by a particular number.
运用百分号，比例或其他数据将做梦的频率转换成有用的数据；
using percentages, ratios, or other statistics to transform raw frequencies into meaningful data;
它们使用百分号（%）而不是与字符，可以是命名实体或外部实体。
They use the percent (%) symbol instead of the ampersand, and can be either named entities or external entities.
除了数值之外，逗号也被标记为一个分组分隔符，百分号被标记为一个百分数。
Besides the Numbers, the comma is also flagged as a grouping separator and the percent sign is flagged as a percent.
他说，在年龄后加个百分号，就是你应该全力保护防止赔钱的退休积蓄的比例。
He says, take your age and put a percentage after it. That is the percentage of your retirement savings that should be fully protected from losing value.
他说，在你年龄后面加个百分号，就是你应该全力保护防止贬值的退休积蓄的比例。
That is the percentage of your retirement savings that should be fully protected from losing value. So, for a sixty-five-year-old, the rule works like this.
如果需要在可以使用上下文变量的字符串内部使用百分号，则应使用两个百分号(% %)。
If a percent sign is required to be used within a string where context variables can be used, then use double percent signs (% %).
如果XPath表达式本身包含一个百分号，则必须按xml的指定方式将其转义(使用%)。
If an XPath expression contains a percent sign itself, it must be escaped, as specified by XML (using %).
所以就像我们采用笨拙的方式来用反斜杠来避免一些东西，在这个背景下对百分号做相同的处理。
So just as we had to escape things with backslashes in an awkward way, same deal with percent in this context.
百分号(%)将转换为空行，所以如果要使用%或其他任何特殊字符，就要在前面加上反斜线(\)。
A percent sign (%) is translated to a newline, so if you want a % or any other special character, precede it with a backslash (\).
另外一个方法就是使用求模运算符了，百分号%就是了，求模运算就是求余数，会把两个数相除然后返回余数。
An alternative is to use the modulus operator, %, which divides two Numbers and returns the remainder.
由于百分号(%)本身可以是URL编码的，所以攻击者可以向服务器提交一个精心制作的、基本上是双重编码的请求。
Because the percent sign (%) itself can be URL encoded, an attacker can submit a carefully crafted request to a server that is basically double-encoded.
下面是US - ASCII编码字符集中这些函数将采用百分号编码的的可打印字符列表，码值为32到126(十进制)。
Following is a list of printable characters from the US-ASCII coded character set, specifically the octets ranging from 32 to 126 (decimal), that the functions will percent-encode.
为了说明stdin和stdout，您可在终端窗口中输入以下文本(假设前面的百分号(%)为您的shell提示符)。
To demonstrate stdin and stdout, type the following text in your terminal window (assume that the leading percent sign (%) is your shell prompt).
EXSLT定义的str：encode - uri也执行百分号编码，但是与encode -for - uri相比少了5个保留字符。
EXSLT defines STR: encode-uri , which also performs percent-encoding, but for five fewer reserved characters compared to encode-for-uri .
另外一个方法就是用格式运算符，也就是百分号%。在用于整数的时候，百分号%是取余数的运算符。但当第一个运算对象是字符串的时候，百分号%就成了格式运算符了。
An alternative is to use the format operator, %. When applied to integers, % is the modulus operator. But when the first operand is a string, % is the format operator.
另外一个方法就是用格式运算符，也就是百分号%。在用于整数的时候，百分号%是取余数的运算符。但当第一个运算对象是字符串的时候，百分号%就成了格式运算符了。
An alternative is to use the format operator, %. When applied to integers, % is the modulus operator. But when the first operand is a string, % is the format operator.
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