双语例句

1. Although scientists are still studying the swine-flu strain responsible for the current outbreak, experts doubt that existing seasonal vaccines can effectively combat it.

尽管科学家还在研究导致这次猪流感的病毒株，专家们怀疑现有的季节性疫苗能否有效抗击它们。

2. Officials say the current outbreak might have been caused by water polluted with waste from cattle.

官员说，目前爆发可能由于牛排泄物污染水源造成的。