It also details in concrete terms the composition of the three tokens (a plus sign, a minus sign, and an integer) that the parser expects to encounter while scanning through the input stream.
它还详细描述了三个记号(加号、减号和整数)组合的具体项，解析器在扫描整个输入流时希望遇到这些项。
It has changed from a minus sign to a plus sign because of this positive acceleration.
速度的符号已经，由负变正了，可是加速度又还是正的。
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。
If you call this plus, then if you get a minus sign, you know that the velocity is in the opposite direction.
你若称此为正号，你若想要一个负号，你们知道的，相反方向的速度。
I don't want to have a plus and a minus sign there have to think about that it means the same thing.
考虑同一物体时，我可不愿把符号倒来倒去。
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。
In the last letter he simply wrote out a plus and a minus sign, and I was supposed to cross one out.
最近一封信，他索性把加减号都写好，我只要划掉一个就行。
The User Level 10 user shows neither a minus nor a plus sign;
用户级别10，既不显示加号也不显示减号；
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。
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。
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。
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