Also, this kind of qualitative detecting method for nitrate can be applied in the initial enrichment system of freshwater nitrite-oxidizing bacteria.

该方法亦适用于淡水亚硝酸氧化细菌初始富集培养过程中硝酸盐的定性检测。

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The initial deal should trade suspension of enrichment for suspension of sanctions.

最初的协议应该以暂停浓缩活动换取暂停经济制裁。

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Ali Velayati, who was foreign minister from 1981-97, and remains a top adviser to Iran's Supreme Leader, Ayatollah Ali Khamenei, has publicly declared that Iran should accept the proposal, which calls for an initial six-week period of preliminary talks, during which Iran would forego any expansion of its enrichment programme in exchange for a freeze on new sanctions.

ECONOMIST: Iran��s confrontation with the West