【化】 noise pollution level
【计】 noise
【化】 noise; unpitched sound
pollute; contaminate; empoison; stain; taint; vitiate
【计】 fouling
【化】 contaminate; contamination; pollute; pollution
【医】 contaminate; contamination; inquination; pollution
【经】 contamination
class; grade; level; o-level; rank; stage; step
【医】 grade