科学美国人60秒 SSS 2014-01-06_在线英语听力室

(单词翻译:双击或拖选)

The warm waste environment of your mouth makes it a great place for bacteria, some of which keep busy causing cavities. Such dental difficulties were thought to a really taken-off for we switch from hunting gathering¹ to agriculture and had a ready supply of farmed fermentable² carbohydrates⁴.

Now research shows that at least some pre-agricultural humans also had a bad case of tooth decay. The study is in the proceedings⁵ of the National Academy of Sciences.

One hundred gatherers resided in Morocco called GlutoPeijohn was a key ritual and economic center. The deposits there date to some 15,000 years ago and are incredibly dry, so organic material, including bones and chart plan remains⁶ are well preserved.

Researchers found leftover⁷ panmites junifer, perstashio, wild oats, and particularly popular carbohydrate³ reach icornts, eaten and raw or as flour, yicornts can sticken in teeth. The food stuff makes a happy home for acid-loving bacteria that cause cavities.

The scientists also analyzed⁸ teeth from 52 partial or complete jaws⁹. They found that more than half the teeth showed signs of lesion and only three of the adults were cavity-free, thousands of years before folks in the area learned to farm.

点击

收听单词发音

1 gathering
n.集会，聚会，聚集
参考例句：
He called on Mr. White to speak at the gathering.他请怀特先生在集会上讲话。 He is on the wing gathering material for his novels.他正忙于为他的小说收集资料。

2 fermentable
adj.可发酵的，发酵性的
参考例句：
We will discuss fermentable fiber more in Part 5 of this series. 我们将会在这系列的部份5讨论沸腾的纤维更多。来自互联网 The conditions of fermentable and enzymatic conversion of M14 were optimized. 对高活性突变株M14的细胞转化和发酵转化条件进行优化。来自互联网

3 carbohydrate
n.碳水化合物；糖类；(plural)淀粉质或糖类
参考例句：
You should not have too much carbohydrate in your diet.你日常饮食中不该有过多碳水化合物。 Cashew nuts are rich in carbohydrate.腰果含丰富碳水化合物。

4 carbohydrates
n.碳水化合物，糖类( carbohydrate的名词复数 )；淀粉质或糖类食物
参考例句：
The plant uses the carbohydrates to make cellulose. 植物用碳水化合物制造纤维素。来自《简明英汉词典》 All carbohydrates originate from plants. 所有的碳水化合物均来自植物。来自辞典例句

5 proceedings
n.进程，过程，议程；诉讼(程序)；公报
参考例句：
He was released on bail pending committal proceedings. 他交保获释正在候审。 to initiate legal proceedings against sb 对某人提起诉讼

6 remains
n.剩余物，残留物；遗体，遗迹
参考例句：
He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。 The remains of the meal were fed to the dog.残羹剩饭喂狗了。

7 leftover
n.剩货，残留物，剩饭；adj.残余的
参考例句：
These narrow roads are a leftover from the days of horse-drawn carriages.这些小道是从马车时代沿用下来的。 Wonder if that bakery lets us take leftover home.不知道那家糕饼店会不会让我们把卖剩的带回家。

8 analyzed
v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析
参考例句：
The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。来自《简明英汉词典》 The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程，因为对他来说，爱是个不可分析的迷。来自《简明英汉词典》

9 jaws
n.口部；嘴
参考例句：
The antelope could not escape the crocodile's gaping jaws. 那只羚羊无法从鱷鱼张开的大口中逃脱。 The scored jaws of a vise help it bite the work. 台钳上有刻痕的虎钳牙帮助它紧咬住工件。

在线英语听力室_免费在线英语听力学习网站

科学美国人60秒 SSS 2014-01-06