单词：
单词： 相关文章
Every six months, I visit my dentist for a regular dental check up. At the dentist's office, a dental assistant will bring me into one of their private patient rooms and x-ray my teeth and gums to detect any problems inside my teeth. Then, the dentis
社会—In the Community
Australia's wild dog, the dingo is on the prowl. Today it hunts alone. A sign the dingo was probably on the lookout for small game. But it senses a larger opportunity, a baby kangaroo called Joey makes an excellent target. Its too big for his mother
国家地理2007年
DAVID GREENE, HOST: Maybe you've seen the film Jurassic Park, and you remember that scene where the Tyrannosaurus rex escapes its pen and attacks guests at the theme park. You might remember those imposing teeth. Well, in real life, the T. rex had th
2017年NPR美国国家公共电台5月
ARI SHAPIRO, HOST: Centuries ago in the Middle Ages, religious scribes labored over lavishly illustrated books. Most of these illuminated manuscripts were made by anonymous artists. Now scientists say they have a new kind of evidence that could revea
2019年NPR美国国家公共电台1月