文字稿

美國研究人員對與我們祖先生活方式相似的非洲和南美洲社會居民的睡眠習慣進行了調(diào)查研究。研究表明我們祖先的睡眠時間可能少于我們。以下是 Rebecca Morelle 的報道。

From artificial lights to late-night TV and now our smartphones, modern life is often blamed for ruining our sleep. But this study suggests our ancestors didn't get any more sleep than we do.

The researchers monitored traditional societies in Namibia, Tanzania and Bolivia, where people live like ancient hunter-gatherers once did. They found they slept on average six and a half hours a night.

Surprisingly, natural light didn't have as big an influence as was thought. Most people fell asleep hours after sunset. However, temperature was important. The morning's coldest point was when most people woke up.

Insomnia was also extremely rare.

詞匯表

artificial lights 人工照明
ruining 破壞
traditional 傳統(tǒng)的 （這里指古老的、遠古社會）
hunter-gatherers 依靠狩獵為生的人
natural light 自然光
insomnia 失眠

測驗

請聽報道并回答下列問題。

1. Which factors were said to make us sleep less in the 21st century?

2. Why did the researchers study societies in Tanzania?

3. True or false? People fell asleep as soon as it got dark.

4. True or false? Heat was more important than light in influencing sleeping patterns.

答案

1. Which factors were said to make us sleep less in the 21st century?
Artificial lights, late-night TV and smartphones.

2. Why did the researchers study societies in Tanzania?
Because they found societies which live in a similar way to ancient hunter-gatherers.

3. True or false? People fell asleep as soon as it got dark.
False. People fell asleep hours after it got dark.

4. True or false? Heat was more important than light in influencing sleeping patterns.
True. According to the report, natural light was not a big influence, but temperature was – people woke up at the coldest point of the morning.