【电】 noise-improvement factor
cacophony; noise; souffle
【化】 unpitched sound
【医】 murmur; souffle; susurration; susurrus
ameliorate; amend; improve; meliorate; mend; reform; remedy; amelioration
melioration; reformation
【医】 amelioration; conditioning; improvement
【经】 recondition
factor
【电】 factor