听一分钟英文：Diseases-疾病

One day, all diseases on Earth will be gone. I wonder. In fact, if all diseases die out or doctors find vaccines¹ and cures for them, that will really change our planet. Think about the amount of overpopulation if no one died from diseases. There’d be a population explosion. I don’t think the Earth would be able to feed so many people. It’s a really difficult question. Some diseases in the world are really horrible and cause a lot of suffering. It would be great if scientists found cures for those. Scientists have already found a cure for many diseases. It’s amazing how far science and medicine have come. I think more cures for diseases could be found if governments spent more money. They seem to spend so little on controlling disease.

1 vaccines   

疫苗，痘苗( vaccine的名词复数 )

参考例句：

• His team are at the forefront of scientific research into vaccines. 他的小组处于疫苗科研的最前沿。
• The vaccines were kept cool in refrigerators. 疫苗放在冰箱中冷藏。