Add Ferroin indicator and titrate with 0.025 N ferrous ammonium sulphate solution.加入亚铁菲绕啉离子,用滴定法测量硫酸亚铁铵溶液.The water was reacting with the ferrous iron in the tank.水与水箱中的铁质产生化学反应.Using genedifferential gene expression in ...
蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.有机物分解的最后程序称为腐殖质化.The final process in organic matter decomposition is known as humification.腐殖质是已知能够覆盖滤膜的物...
The examiners put a premium on rational argument.评委们对以理服人的论据给以高度评价.The examiners plowed half the candidates.主考人员刷掉了一半的应试者.The examiners can drop on any student to answer questions.主考人可以叫任何学生回答问题....
I was put on iron tablets for my anaemia.我曾因贫血吃补铁药片.The Earth is made mainly of iron and silicon and things like that...地球主要由铁、硅等物质构成。A centain iron are called lodestone would attract pieces of iron.某种称为磁石的矿石会吸引铁片.Conclu...