1980年，科学家首次在从尘云中沉淀下来的全球范围的沉积层中识别出这种撞击，这些尘云在撞击后围绕着地球。
Scientists first identified this impact in 1980 from the worldwide layer of sediment deposited from the dust cloud that enveloped the planet after the impact.
通过获得的高光谱数据(hyperspectral data)，科学家绘制了冰层表面硫磺沉淀的范围(红色线)。
Hyperspectral data, scientists have mapped the location of sulfur deposits on the ice surface (red outline).
随着科学家从北极运来更多的沉淀物岩心，波里·亚克及其合作者想了解更多过去冰范围的详细信息，并将此类信息在时间上进一步向后追溯。
As scientists pull more sediment cores from the Arctic, Polyak and his collaborators want to understand more details of the past ice extent and to push this knowledge further back in time.
导出了一个内含最大敏锐指数的终点误差公式，由此获得了一个计算沉淀滴定突跃范围的公式。
Special attention has been paid to relationship between the end point error and maximum sharpness index for precipitation titration.
水不溶沉淀物（乙酰化木质素）的重均分子量分布在341到253之间，分散性系数分布在1.1到1.2这一窄范围内。
The water insoluble precipitate (acetic acid lignin, AcL) had a low weight-average molecular weight range from 341 to 253 (Mw) and a narrow molecular weight distribution from 1.1 to 1.2.
采用分步连续沉淀酶方法，确定硫酸铵沉淀饱和百分数范围。
This paper presents a multiple step and continuous precipitation experiment method to determine the accurate saturation percentages of ammonium sulphate precipitating enzymes.
真正的危险来自直径超过一公里的天体，这种天体所激起的沉淀物足以导致世界范围内的环境破坏，农作物歉收。
The real danger would come from an object more than a kilometer in diameter, which could kick up enough sediment5 to cause environmental damage and crop failures worldwide.
试验证明，山形斜管具有沉淀所需要的良好水力条件，处理原水浊度范围较广等优点。
Research results show that chevron-shaped tube has advantages of better hydraulic condition needed for sedimentation and adaptability for treatment of raw water turbidity.
与物理蒸发沉淀在“可见范围”对比，化学蒸发沉淀能将基体的所有表面都覆盖。
Contrasting to the PVD coating in the "line of sight", the CVD can coat all surfaces of the substrate.
与物理蒸发沉淀在“可见范围”对比，化学蒸发沉淀能将基体的所有表面都覆盖。
Contrasting to the PVD coating in the "line of sight", the CVD can coat all surfaces of the substrate.
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