该不是流行性疾病吧？
乙肝是一种传染性疾病。
It is said an epidemic disease is raging throughout that country.
据说某种传染性疾病正在那个国家肆虐。
This is a social disease that threatens to turn into an epidemic.
这是种社会疾病，并有可能转变为一种流行病。
An epidemic is any unusual excess amount of disease or injuries within a population.
流行病是任何在一定人群中超过一般数额的疾病或损伤。
That disease is nothing less than an epidemic.
那完全是一种流行病。
The camellia gray spot is an important epidemic disease.
山茶灰斑病是严重影响山茶观赏价值的重要病害。
The camellia gray spot is an important epidemic disease.
山茶灰斑病是严重影响山茶观赏价值的重要病害。
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