“polarity”的概念、定义、翻译、参考文献-科学参考

单词	polarity
释义	polarity [pǝ`lar·ǝd·ē] ^{COMMUNICATIONS} 1. The direction in which a direct current flows, in a teletypewriter system. 2. The sense of the potential of a portion of a television picture signal representing a dark area of a scene relative to the potential of a portion of the signal representing a light area. ^MATHEMATICS Property of a line segment whose two ends are distinguishable. ^{MOLECULAR BIOLOGY} The orientation of a strand of polynucleotide with respect to its partner, expressed in terms of nucleotide linkages. ^PHYSICS Property of a physical system which has two points with different (usually opposite) characteristics, such as one which has opposite charges or electric potentials, or opposite magnetic poles.
随便看	hysteresis hysteresis clutch hysteresis coefficient hysteresis damping hysteresis error hysteresis heating hysteresis loop hysteresis loss hysteresis motor hysteretic damping hysteria hysteriaceous Hysteriales hysterical anesthesia hysterical paralysis hysterics hysterochroic hysterogram hysterography hysteromania hystero-oophorectomy hysteropexy hysterorrhaphy hysterorrhexis hysterosalpingectomy

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。