这种病极易传染.It's a highly contagious infection.新城疫 ( NewcastleDisease,ND ) 是由新城疫病毒(NewcastleDiseaseVirus,NDV) 引起的极易传染的毁灭性疾病.Newcastle disease ( ND ) is regarded worldwide as one of the most devastating diseases of poult...
Mr. Darwin also teaches PE.达尔文也教体育.( Since then Perkin - Elmer has changed name twice, first to PE and then to Applera. )( 此后 伯金—艾尔莫 两次易名;开始改为PE,后来改为阿普莱拉. )Premature Ejaculation ( PE ) is most common sexual dysfunction i...