铀的

By measuring the relative abundance of two types of uranium and lead in a zircon, geologists can determine old it is.

通过测量相对两种铀和铅的锆、据地质学家能确定旧。

Australia is the major producer of coal,alumina, bauxite, diamonds, titanium minerals and zircon and ranks second in the world in iron ore, mined lead and uranium.

澳大利亚主要煤碳，氧化铝，铝矾土，钻石，钛矿物质和锆石的生产者和位居第二在世界上在铁矿石内，开采引起和铀。

Applied to titanium, nickel, aluminum, magnesium, molybdenum, tantalum, niobium, silver, platinum, zirconium, uranium, beryllium, lead alloy material, stainless steel, copper, iron, platinum, gold, K gold, K platinum, silver and other precious metals high-quality welding.

适用于钛、镍、铝、镁、钼、钽、铌、银、铂、锆、铀、铍、铅等合金料，不锈钢、铜、铁、白金、黄金、K黄金、K白金、银等贵金属的高质量焊接。

Lead uranium age method, Pb-U dating

机器翻译参考：铅铀年龄的方法，铅ü约会

The influences of dead time of detector and the mass bias on the precision of determination of Uranium isotope ratio studied.

研究了检测器死时间和质量偏倚对铀同位素比测量的影响，对比了三种检测器死时间和质量偏倚校正方法。

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。

In the sub-critical fast reactor core, the inner 7 subassemblies of CDFR were replaced with lead target subassembly, the control rod subassemblies were replaced with the subassemblies which contain MA and depleted uranium, and the radial blanket of CDFR were replaced with reflect subassembly.

次临界快堆堆芯在示范快堆堆芯基础上去掉中间7盒组件放置铅靶组件，控制棒组件用含贫铀和次锕系元素的组件代替，转换区组件用反射层组件代替。

A second prerequisite is that uranium 235 must be present in sufficient abundance.

第二个必要条件是，铀235的含量必须够充足。

To make an atomic bomb we have to use uranium 235, in which all the atoms are available for fission.

制造原子弹必须用铀235，因为它的所有原

To make an atomic bomb we have to use uranium 235, in which all the atoms are available for fission.

制造原子弹必须用铀235，因为它的所有原子都可以裂变。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。