单词：sedimentary iron formation
单词：sedimentary iron formation 相关文章
1. What is this? 2. What is that? 3. What's this? 4. What's that? 5. What are these? 6. What are those? 7. Where is Mr. King? 8. Where is Ms. Knight? 9. Where's Johnny? 10. When's the movie? 11. When's lunch? 12. How is the food? This is a table. Tha
英语词组对话
But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough
火星生命
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? We live in a nice neighborhood. Of the galaxy, that is. The sun is about halfway toward the outer edge of the Milky Way. But the sun may have migrated vast distances t
Scientific American(九)月
By Naomi Schwarz Northern Mauritania 17 October 2007 In arid Mauritania, where Sahara desert meets Sahel grasslands, a train stretching up to two and one half kilometers snakes along the northern border. Built to carry iron ore from mines in the nort
2007年VOA常速英语（十月）
China's iron ore manufacturers say they're struggling to keep their businesses afloat because of high costs and taxes while production is on the rise for the sector's global giants. Brazil's Vale SA is the world's largest iron ore producer and it say
cctv9英语新闻2015年
TEHRAN, Oct. 18 (Xinhua) -- Iranian（伊朗） leaders on Monday urged for the quick formation of the Iraqi government, saying that will serve the interests of the Iraqi people and enable them to enjoy stability, security, unity and prosperity（繁荣
英语新闻