The minus sign (-) or plus sign (+) before each change corresponds with the file names directly above the line.
每个更改前的减号(-)或加号(+)与行上方的文件名一致。
Yacc can recognize patterns of tokens; for instance, as in the example above, it can recognize that an expression can consist of a value, either a plus or minus sign, and another value.
yacc可以识别出记号的模式；例如，如上面例子中所示，它可以识别出一个表达式可能由一个值、一个加号或者减号以及另一个值构成。
To find the time to consider, do in a day, plus or minus sign.
要找出时间来考虑一下，一天中做了什么，是正号还是负号。
If you were born near the end of your sign, near July 18 plus or minus four days, you'll feel the wonderful electricity of Mars' beam to Uranus on July 7 even more.
如果你出生于星座的末尾，接近18号前后四天，你将更多地感觉到7月7日这天火星和天王星的良好相位所散发出来的美妙激情。
To find the time to consider, what did during the day, it is plus or minus sign, if is a very good plus.
要找出时间来考虑一下，一天中作了什么，是正号还是负号，假如是正号很好。
Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value.
接着从这个字符开始，读入一个可选的正负号，然后尽可能多的读入数字，最后将它们解析成数值。
Floating-Point literals may also be represented using exponential notation: a real number followed by the letter e(or E), followed by an optional plus or minus sign, followed by an integer exponent.
此外，还可以使用指数记数法表示浮点型直接量，即实数后跟随字母e或E，后面加上正负号，其后再加一个整型指数。
Floating-Point literals may also be represented using exponential notation: a real number followed by the letter e(or E), followed by an optional plus or minus sign, followed by an integer exponent.
此外，还可以使用指数记数法表示浮点型直接量，即实数后跟随字母e或E，后面加上正负号，其后再加一个整型指数。
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