【化】 denitridation
doff; escape from; miss out; pull off; take off
【医】 de-; des-
【化】 azotizing
【医】 azotize; nitridation; nitrogenization
layer; region; stage; story; stratum; tier
【计】 layer
【医】 coat; lamella; lamellae; lamina; laminae; layer; strata; stratum