評論
打印
聽力文本
Recording 30
錄音30
1. We've recently been doing some research involving mice. We were trying to find out what causes the cells in our body to age.
1、我們最近在做一些和老鼠有關的研究。我們嘗試找出我們體內的細胞老化的原因。
Is it linked to diet or exercise? What we found was that if we allowed the mice no exercise, their cells deteriorated fairly rapidly, giving them a prematurely old body.
這和飲食或運動有關嗎？我們發現，假如我們不讓老鼠運動，它們的細胞退化地相對迅速，身體變得早衰。
The mice that did exercise, showed less change in their cell structure and so seemed younger.
運動的老鼠，其細胞結構的變化更小，看起來更年輕。
2. We've known for decades that pigeons can navigate using the Earth's magnetic field as a sort of compass. What we don't know is how this works.
2、我們幾十年前就已經知道，鴿子能利用地球磁場作為指南針導航。我們不知道的是其工作原理。
In our research, we discovered that the pigeon's brain receives a signal from its middle ear that the brain then processes to determine both their direction and the strength of the magnetic field.
在我們的調研中，我們發現，鴿子的腦部接受來自中耳的信號后，開始處理信息，確定鴿子的方向和磁場強度。
Previously, it had been thought that it was the bird's beak that held the answer. But this has since been proven false.
在此之前，人們認為，答案在鳥喙處。但這已經被證明是錯誤的了。
