短語(yǔ)詞組短語(yǔ)zero water level 零水位;水位零點(diǎn)zero -level acclamation 零級(jí)定址zero cross level 零交叉電平absolute zero power level 絕對(duì)零功率電平ZERO Hazard Level 零風(fēng)險(xiǎn)水平zero relative level sensitivity 零相對(duì)電平霛敏度 返回 zero level