1. Epidemic typhus is passed from human to human by the body louse. 流行性斑疹伤寒是由体虱在人与人之间传播的。
2. They may offer hope in the battle to control the current obesity epidemic. 它们可能在控制当前肥胖病的流行的斗争中提供希望。
3. It is often called the "silent" epidemic because it can infect a patient for decades before being discovered. 丙肝经常被称为沉默的流行病，因为它能够感染一个病人几十年而不被发现。
英英解释
n.
1. a widespread outbreak of an infectious disease; many people are infected at the same time
2. (especially of medicine) of disease or anything resembling a disease; attacking or affecting many in
