Science 4 - Unit 1.5 - Medicines and infectious diseases

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What are germs? 什么是细菌？

Very tiny living things that you cannot see with your eyes. 你用眼睛看不见的非常微小的生物。

What does "infect" mean? "感染"是什么意思？

To make someone sick by spreading germs into their body. 通过将细菌传播到某人体内而使其生病。

What is an infectious disease? 什么是传染病？

An illness that can spread from one person to another. 可以从一个人传播到另一个人的疾病。

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