美国科学60秒 SSS 2013-03-20
时间：2018-12-24 作者：英语课 分类：Scientific American(三)月
英语课
This is Scientific American 60 second Science, I’m Christopher Intagliata. Got a minute?
Olive oil is thought to be healthy because it's mostly monounsaturated fat. But cold-pressed extra-virgin olive oil may have an extra benefit: it appears to be more filling than other fats. That's according to research presented at a German symposium 1 on fat.
Researchers started by feeding 120 volunteers a daily, 18-ounce serving of low-fat yogurt. But mixed in the yogurt were either three tablespoons of either extra-virgin olive oil, canola oil, butter, or lard. Turns out volunteers in the olive oil group reported feeling more full during the three-month study period. And they had larger concentrations of serotonin in their blood—a signal of satiety 2.
The researchers say extra-virgin olive oil contains aromatic 3 compounds that block the absorption of glucose 4 from the blood, delaying the recurrence 5 of hunger. Indeed, study subjects who ate yogurt with just olive oil extract consumed fewer calories over a three-month period than those who ate plain yogurt. And they finished the trial with less body fat too. Which leads these researchers to conclude that olive oil extract could be key to creating a better low-fat snack: tastes great, more filling.
Thanks for the minute for Scientific American 60 second science, I’m Christopher Intagliata.
1 symposium
n.讨论会，专题报告会；专题论文集
- What have you learned from the symposium?你参加了这次科学讨论会有什么体会？
- The specialists and scholars present at the symposium come from all corners of the country.出席研讨会的专家学者们来自全国各地。
2 satiety
n.饱和；(市场的)充分供应
- There is no satiety in study.学无止境。
- Their presence in foods induces satiety at meal time.它们在食物中的存在诱导进餐时的满足感。
3 aromatic
adj.芳香的，有香味的
- It has an agreeable aromatic smell.它有一种好闻的香味。
- It is light,fruity aromatic and a perfect choice for ending a meal.它是口感轻淡，圆润，芳香的，用于结束一顿饭完美的选择。
4 glucose
n.葡萄糖
- I gave him an extra dose of glucose to pep him up.我给他多注射了一剂葡萄糖以增强他的活力。
- The doctor injected glucose into his patient's veins.医生将葡萄糖注入病人的静脉。
5 recurrence
n.复发，反复，重现
- More care in the future will prevent recurrence of the mistake.将来的小心可防止错误的重现。
- He was aware of the possibility of a recurrence of his illness.他知道他的病有可能复发。