two-step reduction in aqueous solution 二步液相还原
two step reduction method 两步还原法
two-step smelting reduction 二步熔融还原
two step photoinduced reduction 两步光化学还原
BARACK OBAMA: "This compromise guarantees more than two trillion dollars in deficit reduction." It's an important first step to ensuring that as a nation, we live within our means.
奥巴马：“这一妥协协议保证了削减2万多亿美元赤字，这是确保美国能够实现“量入为出”迈出的重要的第一步。”
Scandia and rhenium doped tungsten powders were prepared by solid-liquid doping combined with two-step reduction method.
用液-固掺杂及两段还原法制备了氧化钪及铼掺杂的钨粉。
The two-step process involving gas oxidation of phenol to benzoquinone with complex metal ions catalysts and reduction of benzoquinone to hydroquinone with iron powder was studied.
以苯酚为原料，复合金属离子为催化剂，研究用气相氧化合成苯醌，用铁粉还原苯醌制对苯二酚的两步法工艺，考察了氧化过程中的工艺条件对反应的影响。
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