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词语正负拆分为汉字：
正字的拼音、笔画、偏旁部首、笔顺、繁体字，正字字源来历，正字演变
1. 正 [zhèng]2. 正 [zhēng]正 [zhèng]不偏斜，与“歪”相对：～午。～中（zhōng ）。～襟危坐。合于法则的：～当（dāng）。～派。～楷。～规。～大光明。～言厉色。拨乱反～。合于道理的：～道。～确。～义。～气。……
负字的拼音、笔画、偏旁部首、笔顺、繁体字，负字字源来历，负字演变
驮，背（bèi ）：～米。～疚。～重。如释重～。～荆请罪。担任：担～。～责。～累（lěi ）。～罪。～荷。忍辱～重。身～重任。仗恃，依靠：～隅顽抗。自～（自以为了不起）。遭受：～伤。～屈。具有，享有：久～盛誉。欠（钱）：～债。小于零的（数）……
汉语拼音：zhèng fù
If the amount of positive and negative charges is varied, the electron stream can be made to bend up or down in varying amounts.
如果正负电荷的量发生变化，电子流上下弯曲的程度也随之变化。Direction of motion along these three axes--right and left, in and out, up and down--is designated by a plus or minus sign.
沿着这些运动方向的三轴―左、右、进出、上下――是由正负标志。He did not use negative numbers, which he regarded as contradictory, but introduced a complicated scheme called "correspondence of signs" .
他不使用他认为有矛盾的负数，却引进了一套复杂的图表，称为“正负号的对应”。However; that method would be unusable from a language that has no notion of unsigned integers.
但是对于不具备「不带正负号的整数」概念的语言来说，这个方法就无法使用。In terms of relative ranking, all changes are also within two places up or down, and could be considered as nominal.
相对名次方面，所有变化都在正负两名之内，亦属轻微。A molecule where the centers do not coincide is called a polar molecule.
正负电荷中心不重合的分子称为极性分子。The piston of the force transducer is so designed that if fits the face of the force transmitting piston up to within 3 .
这个力传送器的活塞设计上可以使它在大约正负3内与力传导活塞相适应。A traditional capacitor stores electricity as static charges, positive and negative, on two electrodes that are separated by an insulator.
一个传统的电容器以在正负电极间夹着绝缘体并且两端分布静电荷的方式储存电流。The sign of chirp parameters has no effect on the spectral distribution and transversal intensity distribution.
啁啾参数的正负号不影响横向光强分布和光谱分布。