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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 .

可以提供36.6毫克或相当于61%的rda（日摄量），比橙子的维他命含量还要多。