单词	letter carriers
释义	同letter carrier
随便看	normal profits normal program flow normal projection normal propagation normal propyl acetate normal pulse normal--pulse normal pulse polarography normal pulse voltammetry normal quantity normal radar normal radar (nr) normal radar {=nr} normal random noise normal random number normal random number generator normal random process normal random sample normal random variable normal random variable {=gaussian random variable} normal range normal ranges normal rated thrust normal rated thrust (nrt) normal rate of return