Indeed, some sort of enrichment on Iranian soil may be essential to a negotiated deal, argues Mark Fitzpatrick of London's International Institute for Strategic Studies.
伦敦国际关系研究院的马克表示，伊朗进行的某种浓缩活动对于协商的确是有必要的。
2
Iran has so far rejected the deal proposing instead that the enrichment and conversion take place on Iranian soil.
到目前为止，伊朗拒绝接受这项交易，而是提出在伊朗境内进行浓缩和转换。
3
Oxalic acid , citric acid, EDTA can activate soil heavy metals and promote heavy metals element enrichment in E.