花叶病

例句：

1. 1. The outbreak of the swine flu has caused a lot of concern among the public.
   猪流感的爆发引起了公众的广泛关注。
2. 2. The plant is suffering from a viral infection, which is causing it to wilt and die.
   这植物正遭受着病毒感染，导致它枯萎并死亡。
3. 3. The virus is highly contagious and can spread quickly through contact with infected plants or animals.
   这种病毒具有高度传染性，可以通过与感染植物或动物接触迅速传播。