聽力技能是在「有意識」的練習中獲得的！
聽力技能是在「有意識」的練習中獲得的！
聽力技能是在「有意識」的練習中獲得的！
所謂的「有意識」是指：
1. 知道自己要去聽什麼
2. 知道自己為什麼沒有聽懂
一日一篇欄目，我們給出了完整的transcript以及純正的英文音頻，語速與真題相抵，
此篇文章詳細解釋了在我們看來無法理解的「諺語」都是怎麼來的，
吸收這些諺語的同時提高聽力、閱讀以及口語能力
步驟：
1. 通讀全篇文章，搞清楚諺語意思
2. 第二部分看諺語翻譯及講解
3. 第三部分開始無文本播放音頻
4. 聽不懂的詞回來聽
聽力音頻在第三部分
People have been using products made with synthetic rubber for more than a century. But high-quality tires for cars, trucks and aircraft still must contain 40 percent or more natural rubber.
Rubber trees are not very strong. They often have problems in bad weather and suffer from disease. Naturally, then, scientists are looking for rubber substitutes.
Rubber trees grow mainly on plantations in Southeast Asia. These trees are most productive only under the best atmospheric conditions. They need even amounts of rainfall and bright sunshine -- and no strong winds. Rubber trees can be infected with a plant disease. The disease has ruined many rubber plantations in South America, where the trees first grew.
Dandelion plants are much stronger. Anyone who has dandelions on their property knows how hard it is to remove them. These flowering weeds spread easily. They grow in poor soil and do not suffer too much in a changing climate. But qualities that make people dislike dandelions also make them a possible source of synthetic rubber.
Scientists have known for a long time that the dandelion’s milky fluid contains latex, the main substance in raw rubber. The richest source of latex is a plant native to Kazakhstan.
Researchers from Germany are working to engineer the dandelion’s genetic material. The researchers are with the Fraunhofer Institute for Molecular Biology and Applied Ecology. Dirk Pruefer of the Institute says the goal is to produce large amounts of latex that can be used in industry. He said one of the most difficult parts of dandelion research was to produce plants that will be economical.
「And that is why we’re working since years on the breeding program to develop new traits in the plants, stabilized traits – for example, stable rubber content.」
The genetically-engineered dandelion is already producing half a ton of rubber per hectare. But Dirk Pruefer says the scientists』 goal is about two times as much. They would also like to grow taller plants with upright leaves. Machine harvesting works better with such leaves.
Mr. Pruefer says a leading tire manufacturer, Continental AG, already is testing tires made with dandelion-based rubber.
「They made a lot of testing tissues to see the quality of the material. And what you can see is that the quality is similar to that what they have originally done with the rubber from the rubber tree.」
Researchers believe rubber-producing yellow blooms may someday cover large fields that are currently not being used because of poor soil.
synthetic
- adj., of, relating to or produced by scientific methods, as synthetic material
tires
- n., rubber objects that fit around a wheel as in a car
dandelion
- n., a plant, a weed
plantation
- n., a large area of land, especially in a hot part of the world, where crops such as cotton are grown.
source
- n., someone or something that provides what is wanted or needed
synthetic 合成的，人造的
- adj., 屬於、關於或用科學方法生產的，如合成材料
tires 輪胎
- n., 裝在輪子上的橡膠物體，如在汽車裡
dandelion 蒲公英
- n., 植物，雜草
plantation 種植園
- n., 大片土地，尤指世界上炎熱地區種植棉花等作物的大片土地
source 來源
- n., 提供所需或所需的人或物