美国科学60秒 SSS 2013-03-04
时间：2019-01-20 作者：英语课 分类：Scientific American(三)月
Sick of feeling chilly 1? Well, there may be a solution. Because researchers have generated genetically 2 engineered mice that can’t feel the cold. Their work is in the Journal of Neuroscience.
All mammals, us included, sense temperature and touch through nerve cells in the skin. On these nerve cells are different types of receptors that respond either to mechanical pressure in the case of touch, or to heat or cold.
Researchers were able to halt the production of the receptors for cold in the mice, while leaving the receptors for the other sensations intact. They put the cold-insensitive and normal mice in a box where the temperature of the floor ranged from a freezing 32 degrees Fahrenheit 3 to a toasty 122. And they found that the normal mice avoided both extremes, while mice without cold receptors shied away from the hot plate but had no qualms 4 about the chill.
Of course, the researchers were not trying to create comfy cold mice. The real intent was to see if it’s possible to stop just one skin sensation. The hope is to design drugs that can dull pain without leaving patients numb 5. And thus to provide not-cold comfort.
- I feel chilly without a coat.我由于没有穿大衣而感到凉飕飕的。
- I grew chilly when the fire went out.炉火熄灭后，寒气逼人。
- All the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
- Genetically modified foods have already arrived on American dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
- He was asked for the boiling point of water in Fahrenheit.他被问到水的沸点是华氏多少度。
- The thermometer reads 80 degrees Fahrenheit.寒暑表指出华氏80度。
- He felt no qualms about borrowing money from friends.他没有对于从朋友那里借钱感到不安。
- He has no qualms about lying.他撒谎毫不内疚。