They tell him they are with the rda , the resources development alliance .
他们告诉杰克他们是资源开发联盟（rda）派来的人。
Fresh roots are also good in vitamin c ; provide about 9 % of rda .
新鲜的根部也含有维生素c；提供百分之九的日撮食量。
Taking more than the institute of medicine 's recommended daily allowance ( rda ) of certain vitamins may lower one 's risk for certain chronic diseases , he says .
当摄取维他命的量比每日药物推荐机构所规定的量还多时，可能会降低一个人患某种慢性病的危险，他说。
This is 40 times higher than the rda but also a level of supplementation that many people take routinely .
这是rda的40倍，也是很多人日摄入量的补充水平。
Provides 36.6 mg or about 61 % of rda , more than that of in the oranges .
