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A lot of people have had impacted third molars. Third molars produce a lot of chronic pain. Alan Mann, a Prinston University physical anthropologist at the annual meeting of the American Association for the Advancement of Science in Boston on Februar
Is it necessary to have cavities in the baby teeth repaired? 乳牙蛀成了洞还有必要补上吗? If the baby teeth are going to fall out, I don't think that it matters if they become decayed. 如果乳牙是要脱落的,我想蛀了也没有关
ENVIRONMENT REPORT - October 25, 2002: Chinook Salmon Deaths By Cynthia Kirk This is the VOA Special English ENVIRONMENT REPORT. American officials say at least twenty-thousand chinook salmon and othe
An international team of researchers looking for the cause of severe bacterial epidemics has deciphered the genome of group A streptococcus, a normally harmless sore throat pathogen that occasionally turns deadly. Experts say the breakthrough could s
Three days later Lily:Mom, I'm ready for school. Mom:Let me feel your forehead. I'm so glad it wasn't strep throat. Lily:I don't have a fever, and I'm ready for my test. Mom:But I'm not sure you're strong enough yet. Here's some seafood rice soup I m
在这个配合大量图片的演讲中,扬恩亚瑟伯特兰Yann Arthus-Bertrand向我们展示了他最近关于人类和我们地球的3个主要项目一个是他一系列惊人的航拍的照片鸟瞰地球;第二个是在他的网页中,他