单词:
单词: 相关文章
蒋健棠听说学英语 Chapter16:The wildlife biologist
85 新功效的抗生素在加州诞生 DATE=8-15-01 TITLE=SCIENCE REPORT - Designer Antibiotics BYLINE=Jerilyn Watson (Start at 1'04
By Mario Ritter Broadcast: October 28, 2003 This is Steve Ember with the VOA Special English Agriculture Report. Farmers have long put animal waste on their fields. They may also use human waste. Mode
Various stages of cartilage growth on scaffold. The final image on the right shows naturally forming cartilage for comparison. These replacement joints can be made of combinations of metal alloys, plastic and ceramic, but new research shows that it m
Todd: OK, Jamon, we're going to talk about abilities. Jamon: OK Todd: Can you cook? Jamon: I can cook a little bit. I like cooking. Todd: What do you like to make when you cook? Jamon: Just simple things. I love salad. I make a huge salad. Todd: I lo
俄罗斯莫斯科的一位生物能量学教授近日宣布,他已研制出一种能够有效延缓衰老的不老药,并有望于几年内上架销售。这位科学家用40年的时间研制出一种抗氧化剂,能够有效抑制氧分子对人