“symmetrical alternating quantity”的概念、定义、翻译、参考文献-科学参考

单词	symmetrical alternating quantity
释义	symmetrical alternating quantity [sǝ`me·trǝ·kǝl `ȯl·tǝr´nād·iŋ `kwän·ǝd·ē] ^PHYSICS Alternating quantity of which all values separated by a half period have the same magnitude but opposite sign.
随便看	SPST spud spudded-in Spumellina spun glass spun rayon spun silk spun yarn spur spur blight spur dike spur gear spurious correlation spurious disk spurious emission spurious modulation spurious radiation spurious response spur pile spurrite spurt tone sputtering sputter-ion pump sputum sp vol

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