单词	主区块
释义	主区块principal block
随便看	positive valence positive valency positive value positive variation positive vetting positive video signal positive voltage ecl positive vorticity advection positive vorticity advection (pva) positive watermeter positive wave positive--wave positive wing tip rake positive-working photoresist positive-working plates positive yawing moment positive zero positive α bolometer positive β-ray positive ‘and'gate positive ‘and’gate positive ‘or'gate positive ‘or’gate positivism positivisms