单词：heliologist
单词：heliologist 相关文章
01Going Out of Business GLOSSARY to gobelly up to fail as a business; to have to close because a business is not earning enough money* The farm went belly up when it didnt rain enough for two summers in a row. to struggle to try very hard or for a ve
2008年ESL之商务英语
This is Scientific American's 60-Second Science, I am Karen Hopkin. This'll just take a minute. Biologists, traditionally track migrations by tagging animals with devices that allow their movements to be monitored. But Homo sapiens can't be fitted wi
Scientific American(六)月
By Deborah Block Washington, DC 23 May 2006 watch New Sunscreen report Sunscreen with helioplex A new ingredient in sunscreen is being called the most important advance in skin protection from the sun
2006年VOA标准英语（五月）
By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c
2006年VOA标准英语（十一月)
Julianne: Im really glad to be back in Macville. What happened to the market that used to be here? Helio: Oh, it went belly up . It struggled for many years. The owners tried to downsize and reduced the space they were renting, but they had to throw
地道美语播客