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。
If you call this plus, then if you get a minus sign, you know that the velocity is in the opposite direction.
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, do in a day, plus or minus sign.
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。
To find the time to consider, what did during the day, it is plus or minus sign, if is a very good plus.
她开始做题前，很细心地看题目数字前是正号还是负号。
She carefully noted whether her math problems had pluses or minuses before she began her work.
正号表示已经分配而负号表示该磁带还没有被分配。
A positive sign signifies the assignment of a tape and a negative sign signifies that the tape has not been assigned.
在下面的面板，你可以改变变形球物体的类型，你可以把它和同一个集里的变形球物体设成负的(带负号的，和正号相对)。
In this latter Panel you can also change the Meta Object type and set it negative (that is subtractive, rather than additive) with other Meta Objects of the same set.
他似乎把正号误作负号了。
他似乎把正号误作负号了。
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