[全屏观看] 点击右键- 另存为 可保存这个Flash影片...
U.S. authorities have expanded fishing restrictions in the Gulf of Mexico because of fears of contamination from the BP oil leak. The spill poses a threat to the safety of seafood from the Gulf, and the future of the fishing industry in Louisiana and...
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. If you get a scratch, your skin can heal itself. But if your car gets scratched, it stays scratched. Scientists at the University of Southern Mississip...
shrimp crab 不管是英文还是中文，人们往往用动物的名称来形容人，例如骂人的时候说某人像猪，像狗，或者赞扬某人鹤立鸡群等。美国人有时把人形容为像...
