VOA慢速英语:A New AIDS Plan for the US, and New Hopes for a Vaccine

例句：The child was infected with influenza.
      那小孩感染了流感。

2.antibody n.<生>抗体

例句：Antibodies in breast milk protect babies against infection.
      母乳中所含的抗体可以保护婴儿免受感染。

3.strains n.菌株

4.block v.阻碍，阻挠，阻止，妨碍

例句：A snowdrift blocked his path.
      雪堆阻碍他的去路。

      to block a legislation
      阻挠一项立法(的通过)

5.attach  vi.从属，附属；附着，附加，归属

6.inactivate v.使不活泼,阻止活动

7.otherwise conj.否则; 要不然

例句：You'd better go now, otherwise you'll miss the train.
      你最好现在就走, 要不然就赶不上火车了。

8.suppress vt.政府、统治者等 镇压；（武力）平定；压制

例句：The new government quickly suppressed the rebellion.
      新政府迅速把叛乱镇压下去。

抑制(感情等), 忍住

例句：Even the grave young woman could not suppress a smile.
      连那个严肃的年轻妇女都禁不住笑了。