【电】 noiseless recording
naught; nonexistence; not; nothing; without; lack; zero
【医】 a-; leipo-; lipo-; non-
cacophony; noise; souffle
【化】 unpitched sound
【医】 murmur; souffle; susurration; susurrus
record; mark; register; account; memorize; report; take notes
【计】 design development record; posting; REC; record
【医】 protocol; reading; register; registration
【经】 entry; keeping of record; mark; record; record keeping; records