单词：oral bacteriology
单词：oral bacteriology 相关文章
More oral practice [00:21.33]更多的口头练习 [00:23.07]In the supermarket [00:25.04]在超级市场 [00:27.01]You are in a supermarket with your parents. [00:29.05]你与你的父母在一家超级市场。 [00:31.09]What are you going to buy?
沪教版牛津小学英语六年级
More oral practice [00:23.14]Listen and read [00:26.70][ei] a baby favourite [00:33.85]a-e grade space [00:38.43]ai sail paint [00:43.47]ay lay stay [00:48.43]eigh eight weight [00:53.11][ai] i pilot tiger [01:00.68]i-e line white [01:06.25]y fly sky
沪教版牛津小学英语五年级
Oral Cancer Caused by HPV Soars in Developed Countries The human papillomavirus, HPV, is actually many different viruses. One particular strain causes oral cancer, and doctors say the number of cases is reaching epidemic levels. Most of the victims a
VOA标准英语2013年(六月)
SCIENCE REPORT – February 13, 2002: Oral Health Study By George Grow This is the VOA Special English SCIENCE REPORT. A new report examines the problem of tooth and gum disease in the United States.
科技之光
By Jessica Berman Washington 27 November 2007 Endemic cholera, a potentially fatal diarrheal disease found in the world's poorest countries, could be effectively controlled by orally vaccinating half of the affected populations once every two years f
VOA常速英语2007年（十一月）
I must pause for one fast second and say a fast word about oral contraception. 我必须打断一下，很快地说一句关于口头避孕的事。 I was involved in an extremely good example of oral contraception two weeks ago. 两星期前，我碰到
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