单词：fuel high heating value
单词：fuel high heating value 相关文章
Nowadays, most of the food we eat is cooked in ovens or on stoves. The heat which is needed to cook this food comes from burning wood, gas, or other fuels1. However, natural resources2 are decreasing. When fuel becomes less available, people have to
常春藤生活英语
This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? To keep your car purring, you have to change the oil. Such maintenance produces eight billion gallons of used motor oil annually. Some waste oil does get re-refined to pro
Scientific American(三)月
SCIENCE IN THE NEWS - A Silent Killer Carbon Monoxide Poisoning This is SCIENCE IN THE NEWS, in VOA Special English. I'm Christopher Cruise. And I'm Bob Doughty. Winter has brought cold weather to many parts of Earths northern hemisphere. With the co
2013年VOA慢速英语(三)月
This is SCIENCE IN THE NEWS, in VOA Special English. I'm Christopher Cruise. And I'm Bob Doughty. Winter has brought cold weather to many parts of Earths northern hemisphere. With the cold comes a danger as old as mans knowledge of fire -- death or i
英语语言学习
As rising fuel costs drive up the cost of transportation, the transportation industry itself is being forced to change. America's biggest carmaker is closing factories where its largest vehicles are made, and expanding plants that build small cars.
VOA标准英语2008年（八月）
Ya?l: Welcome to another episode of Lunch with Don and Ya?l. So, Don, what are you eating today? Don: Nothing. Y: Nothing!?! Are you on a diet or something? D: Not by choice. To be honest, I'm trying to save money by buying less food. Y: Why? D: Beca
英语时差8，16