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。
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。
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