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Worms seem like strange animals to send to the International Space Station. It's not like astronauts are going to take time off to go fishing and need to bait their hooks. So why send worms? Believe it or not, scientists are using a microscopic worm,
If the world were a Village of 100 People 如果世界是个一百人的村落 David J.Smith/大卫.史密斯 Shelath Armstrory /谢拉.阿姆斯壮 If we could shrink the earth's population to a village of precisely 100 people, with all the exstin
Occlusal wear - loss of enamel on the biting surface of the teeth due to the abrasive action of chewing natural unprocessed food. Odontoblast process - the extension of the cy lasm of an odontoblast w
SCIENCE IN THE NEWS - October 22, 2002: Nobel Science Prizes By George Grow VOICE ONE: This is Steve Ember. VOICE TWO: And this is Bob Doughty with SCIENCE IN THE NEWS, a VOA Special English program a
Supplement: Some Useful Sentences On Orders 有关订单的常用语句 (1) We thank you for your quotation of February 20 and enclose herewith our Order No. 456 for the captioned goods. As the goods are urgently required by our customers, we hope yo
Part five 第五章 Endodontic Treatment 根管治疗法 There's a patient with severe pain in the waiting room, Doctor. 医生,在候诊室有一个病人牙痛得很厉害。 Take an X-ray and ask him to sit down in treatment room number two. 给她