retroviruses是retrovirus的复数
retrovirus
美 ['retroʊ.vaɪrəs] 
英 ['retrəʊ.vaɪrəs] 
- n.反转录病毒
 - 网络逆转录病毒;反转录病毒科;逆转录酶病毒
 
复数:retroviruses  
n.  | 1. a virus whose genetic information is contained in RNA rather than DNA. 2. a virus of the group that includes the aids virus  |