单词：calcium mineral
单词：calcium mineral 相关文章
VOICE ONE: This is SCIENCE IN THE NEWS, in VOA Special English. I'm Barbara Klein. VOICE TWO: And I'm Bob Doughty. Today we tell about osteoporosis, a disease that can make bones weak so they break easily. (MUSIC) VOICE ONE: An x-ray of a bone fract
VOA慢速英语2009年（四）月
FAITH LAPIDUS: This is SCIENCE IN THE NEWS, in VOA Special English. Im Faith Lapidus. BOB DOUGHTY: And Im Bob Doughty. Today we tell about osteoporosis, a disease that can make bones weak so they break easily. (MUSIC) FAITH LAPIDUS: A new study shows
2010年VOA慢速英语(八)月
New news is goo newswhen its inside our bones, anyway. Because a combination of imaging techniques and modeling has revealed that our bones are filled with a natural chemical goo thats key to the bones function as support structures. The finding is i
英伦广角
Osmotic pressure - Water tends to move towards dense concentrations of ions. Sugar solutions on the surface of exposed dentine cause water to be drawn out of the dentinal tubules causing which distort
医务英语
加速钙和矿物质吸收的蛀牙新疗法 For over a hundred years, dentists have been repairing cavities by removing the decayed tooth tissue with a drill and filling the hole with metal or plastic material. Depending on the cavitys depth, this
VOA标准英语2015年(十二月)
New news is goo newswhen its inside our bones, anyway. Because a combination of imaging techniques and modeling has revealed that our bones are filled with a natural chemical goo thats key to the bones function as support structures. The finding is i
2016年Scientific American(八)月