科学家正在研究如何阻止逆转录病毒将遗传物质插入宿主细胞。

Scientists are studying how to prevent ___retroviruses from inserting their genetic material into host cells.

艾滋病是由逆转录病毒引起的，它会将RNA逆转录为DNA插入宿主细胞。

AIDS is caused by ___retroviruses that convert their RNA into DNA and insert it into host cells.

某些逆转录病毒与人类淋巴瘤的发生有关。

Some ___retroviruses are associated with the development of lymphoma in humans.