查询词典 thorium

An inductively coupled plasma-atomic emission spectrometric method for the determination of trace thorium in uranium dioxide was established.

采用717型阴离子交换树脂分离试液中钍，建立了电感耦合等离子体原子发射光谱法测定二氧化铀中痕量钍的新方法。

PWR of Daya Bay Unit 1 is selected as a referenced reactor type,and a new assembly including 36 thorium dioxide elements and 4.2% enriched 235U is designed without change of physical dimension and structural materials of assembly and core.

以大亚湾第1机组压水堆为参考堆型，不改变反应堆栅元、组件和堆芯的结构与几何尺寸，设计出含36根钍棒、4.2%235U富集度的新型含钍组件，并对含钍组件和3.2%富集度的铀组件进行中子学计算和分析。

In this case the geologists drilled into the stalagmites and estimated their age from the way that uranium decays into an isotope of thorium.

地质学家在石笋上钻孔，使用铀衰变成钍的同位素的方法确定它们的年龄。

It is not true, as is sometimes thought, that the high concentration of radium in Brazil nuts is due to elevated levels of the uranium and/or thorium series in the soil in which the tree grows.

其实，不是这样的。

Company covers an area of 20,000 square meters, construction area of 10,000 square meters and capacity for products: Tungsten 500 million meters, par 200 tons of tungsten, molybdenum wire 500 million meters, molybdenum-50 tons, 50 tons of heating, tungsten cerium Electrode 100 tons, 80 tons of tungsten electrodes thorium, magnetron series of 50 tons of molybdenum parts, display series Re tungsten wire, alloy wire, such as 80 million meters, contacts, alloy tool Series 80 tons of material. In 1997 through the ISO9000 quality system certification, the products are exported around the world.

公司占地面积二万平方米，建筑面积一万平方米公司产品和产能：钨丝5亿米、钨杆200吨、钼丝5亿米、钼杆50吨、加热子50吨、钨铈电极100吨、钨钍电极80吨、磁控管钼零件系列50吨、显示器件系列铼钨丝、合金丝等8000万米、触点、刀具系列合金材料80吨。1997年通过ISO9000质量体系认证，产品远销世界各地。

Most branches of Irtysh River have little been impacted by human activities so uranium and thorium levels are much lower than that in the main stream.

额尔齐斯河主河道水中铀明显受人为活动影响，向下游呈增高趋势。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。