词汇短语 ... extinction ( n.) :the fact or state of being or becoming extinct；dying out，as of a race，species of animal，etc．(动物的)灭绝，绝种 rip (v．) :cut or tear apart roughly or vigorously撕，扯 spectral ( adj.) : of or like a specter；phantom；ghostly鬼怪(似)的；幽灵(般)的 ...
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superimposed ripple voltag 附加波动电压
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