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House dust full of bacteria 家中的灰尘里藏有九千种细菌

Episode 150828 / 28 Aug 2015

文字稿

最新的研究报告说,一户普通人家的家中会隐藏着约九千种不同类型的微生物,这些微生物是怎么进来的呢?以下是 Rebecca Morelle 的报道。

A genetic analysis revealed that the average household had more than 2,000 species of fungi. The types of fungus found though depended on the home's location, suggesting these minute organisms are drifting in from outside.

The researchers also discovered an average 7,000 different types of bacteria per household. But the species varied according to whether men or women were the main residents or whether they lived with cats or dogs.

Although the study was carried out in the US, the scientists say the findings are also relevant around the world.

词汇表

genetic analysis 基因分析
household 家庭
fungi (复数)真菌
organisms 生物
bacteria (复数)细菌
species 物种,种类

测验

请听报道并回答下列问题。

1. How many species of fungi are in the average home?
2. True or false? These organisms can be from outside the home.
3. Find a word which means very, very small.
4. Is this study only about the US?

答案

1. How many species of fungi are in the average home?
Answer: There are more than 2,000 species of fungi in the average home.

2. True or false? These organisms can be from outside the home.
Answer: True. The study suggests that organisms drift in from outside the home.

3. Find a word which means very, very small.
Answer: 'Minute' means very small.

4. Is this study only about the US?
Answer:  The study took place in the US, but its results are relevant in countries around the world. 

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