单词:cavitating body
单词:cavitating body 相关文章
[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:05.10]1996 [00:06.69]Vitamins are organic compounds necessary [00:09.52]in small amounts in the diet [00:11.34]for the normal growth and maintenance [00:13.45]of life of animals, including man
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VOICE ONE: This is SCIENCE IN THE NEWS, in VOA Special English. I'm Bob Doughty. VOICE TWO: And I'm Faith Lapidus. This week, we tell about vitamins. (MUSIC) VOICE ONE: Vitamins Many jobs must be done with two people. One person takes the lead. The