Definition: An infectious disease can be passed from one person to another. Level: C2
肝炎是一种传染病。
Hepatitis is an ___infectious disease.
一些传染病可能在几小时内在各大洲之间传播。
Some ___infectious diseases can spread across continents within hours.
普通感冒的传染性很强。
The common cold is highly ___infectious.
