查询词典 Zr

Study shows that the wastewater from Koktokay rare metals mine which is located in the upstream of the important Irtysh River and main products Li, Be, Nb and Ta contain high level elements of Li, Be, Nb, Ta as well as U, Th, Cs and Zr and so on.

尽管当地有关部门对稀有多金属矿的放射性问题也有所涉及，但至今对稀有多金属矿开采过程中的放射性问题的研究文献仍然非常稀少。

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。