穿过地理梯度, 莱文斯预料有分布区不重叠的小种或近群种.Across geographic gradients, Levins expects allopatric races or coenospecies exist.航空磁梯度仪在六十年代中期交付使用.The airborne magnetic gradiometer came into use in the middle 1960 s.这说明水动力条件具有很明显的位能梯度.Thi...
Cupric azide is insoluble in water.叠氮化铜不溶于水.Guanyl azide is then isomerized to aminotetrazole.随后,叠氮化脒异构化生成氨基四氮杂茂.It is possible to harness the versatile chemical properties of cyanogen azide.氰化叠氮的灵活多变的化学性质是可控制的.Silver az...
Some seed varieties germinate fast, so check every day or so.有一些种子发芽快，所以差不多每天得察看一下。Heat and moisture will germinate the seeds.温度和水分会使种子发芽.Some seed varieties germinate fast, so check every day or so...有一些种子发芽快，所以差不多每天得察看...