negative ad负面广告negativeadj.否定的；消极的；负面的；负的n.否定；反面意见；底片；[数]负数vt.否定negative line feed反向行进negative glow lamp辉光放电灯,负辉灯,辉光放电管negative stiffness负劲度negative character反面人物negative selection图书剔旧negative input end负输入端negative-damping负阻尼negative bus-bar负母线, 阴极母线negative catalysis缓化(作用), 负催化(作用)negative blindness否认盲

1. Therefore the whole atom is neither positive nor negative.
   因此，整个原子，既不带正电，也不带负电。
2. The positive nanocapsule can interact with the negative biomembrane, resulting in targeted delivery on specific sites.
   带正电的奈米胶囊，可与带负电的生物膜交互作用，而达到特定位置之标靶投药。