Indeed, some sort ofenrichment 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
Slope position on soil nutrient distribution is also a certain degree of impact, soil nutrients more in slope and the lower enrichment.
坡位对土壤养分分布也有一定程度的影响，土壤养分多在坡中、下部富集。
3
We use traditional enrichment, screening, purification methods to select 10 degrading bacteria of 8 kinds of phenolic compounds from a soil sample polluted by phenol wastewater.