锆的

According to the isotopic age data of inherited zircons in igneous and metamorphic rocks which occur at the surface and are derived from deep crust of the North China, Yangtze blocks and Qinling-Dabie orogenic belt, the paper is mainly reports some new information of Archean rocks and briefly discusses its geological significance.

本文根据华北和扬子陆块及秦岭大别造山带地表和深部出露的各种岩石中发现的继承性锆石的测年数据，报道了太古宙基底和岩浆事件的新信息，并简要地论述其地质意义。

By the single zircon U Pb dating method, the quartz syenite porphyny yielded an age of concordance (1 731±29)Ma, and the aegirine augite syenite and syenogebbro are dated upper cocordi...

应用单锆石U Pb法测定年龄，石英正长斑岩谐和年龄为( 1731± 2 9)Ma ，霓辉正长岩、正长辉长岩上交点年龄分别为( 1644± 14)Ma、( 1750± 65)Ma.1650～ 170 0Ma是碱性岩浆活动热构造事件的标志，石英正长斑岩被中元古代晚期的高山河组不整合覆盖，故以 1650～ 170 0Ma作为熊耳群的上限。1650～ 170 0Ma热构造事件是华北地块重大地质事件，有可能是进一步划分中元古代重要的年龄界限。

The properties of the Yb〓 and Dy〓, which has important value on researching and application, are studied by measuring the absorption and emission spectrum.

然后通过测得的掺Dy〓和Yb〓的氟锆酸盐玻璃的吸收和发射光谱，对具有重要研究和应用价值的稀土离子Yb〓和Dy〓进行了研究。

The anti-jamming ability of igniter depends on the charge in the igniter. The combustion of the igniter charged with barium nitrate and those charged with magnesium powder and PTFE is stable, while the igniter charged with zirconium hydride and lead oxide is unstable. The standard error of duration of the third kind of igniter flame is 523 ms ,and also its nozzle hole is blocked seriously.

不同药剂的点火具抗干扰性能不同，其中以硝酸钡为药剂主成分的点火具和以镁粉＋PTFE为药剂主成分的点火具燃烧性能稳定，以氢化锆、二氧化铅为药剂主成分的点火具工作稳定性较差，火焰持续时间标准差为523 ms，点火具喷孔堵塞严重。

Substantially since their introduction in 1986 they are still typically about twice as expensive as titanates.

尽管自1986发明以来，锆酸酯的制造成本降低了许多，但是，它们的成本仍然是钛酸酯的2倍。

Though the cost of manufacturing zirconates has decreased substantially since their introduction in 1986 they are still typically about twice as expensive as titanates.

尽管自1986发明以来，锆酸酯的制造成本降低了许多，但是，它们的成本仍然是钛酸酯的2倍。

Zirconolite-rich synroc is ideal solidification material for solidifying high level radioactive waste .

富钙钛锆石型人造岩石将放射性核素固定在其晶格中作为晶体的一部分固定起来，大大提高了放射性废物处置的长期安全性，是固化高放射性废物理想的固化介质。

Radioactive nuclides are solidified at crystal lattice as one part of crystalloid by zirconolite-rich synroc, which greatly enhances the long-term safety of radioactive waste disposing.

富钙钛锆石型人造岩石将放射性核素固定在其晶格中作为晶体的一部分固定起来，大大提高了放射性废物处置的长期安全性，是固化高放射性废物理想的固化介质。

It shows that the time constant of RC circuit should be about 0.26 nano second to satisfy both conditions, the temperature of Exploding Bridge Wire is lower than the ignition temperature of the powder of Zr, which is 300℃, and the voltage of Exploding Bridge Wire is lower than the military standard of the safe electrostatic voltage .

本文以数值分析模拟在1秒的人体静电放放电时间作用下，推算电路所需连接的电阻与电容，模拟分析得到应连接放电时间常数τ等於0.26奈秒的电阻与电容，才可以同时满足金电桥温度低於点火药锆粉之点火温度300℃与军规安全静电电压100V以下。

The results indicate that the stable temperature time is in accordance with the response time of actual temperature/EMF curve.

结果表明，模拟锆管达到稳定温度的时间与实测得的温度／电动势曲线的响应时间基本相符。

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。