epidemic virus的用法和樣例：
例句
- Many countries are testing plans to deal with a flu pandemic should the virus develop into a more dangerous form.
許多國家的科學家正在研究計劃來防止這種流行性病毒演變成更危險的病毒類型。 - Green tea catechin and theaflavin, which are both present in black tea, have a strong effect on the flu virus.
綠茶兒茶酚，跟紅茶里含有的一樣，都對流行性病毒有很強的影響。
