在这些情况下

Conventional radiochemical methods such as alpha spectrometry, neutron activation analysis, liquid scintillation system, fission track and gamma spectrometry for the quantitative determination of neptunium and plutonium often require complicated and time-consuming sample preparation and separation procedures.

研究环境中铀、镎、钚等长寿命放射性核素的精密测定，对保护公众安全和保护环境，对了解核设施的历史操作情况和现状，都具有重要意义。环境样品基体复杂，铀、镎和钚等锕系元素含量非常低，在复杂的生态条件下，这些核素常常具有复杂多变的化学形态，要准确测定其含量，必须要有灵敏可靠的检测方法。

These include a decrease in sperm production by almost 50 percent, a three- to four-fold increase in testicular cancer, an increase in the incidence of cryptorchidism (undescended testes, a condition where the testes are not in their normal location in the scrotum) and hypospadias.

这些还包括：精子产生量下降大约50%，三倍到四倍的睾丸癌发病率，隐睾症发病率增高（没有下降的睾丸，睾丸没有在阴囊中的情况）、尿道下裂。

Combined with practical work in Liuxiang trade city in Taiyuan, in view of the faults of high power gas discharge lamp the causing reasons are analyzed from three aspects: starting condition, working pressure and supporting equipments.

摘 要：结合太原柳巷商城的工程案例，从大功率气体放电灯的故障入手，从灯的启辉情况、工作管压、配套工作件三方面分析了故障的原因，指出这些原因在系统配套件的作用下引发故障的真相。

If nitrogen is present as single atoms, it would hint that the diamonds were produced rapidly and at relatively low temperature - as might happen if the diamonds formed from pockets of graphite in the zircons in a single, rapid event. That would make the diamonds young.

如果氮元素被证实是以单个原子的形式存在，这意味着钻石是在相对低温的环境下快速形成的——对那些由锆石中的石墨矿囊转变成形的钻石来说，如果单一而快速的条件具备，这种情况就很可能会发生，并将证明这些钻石的年代并不久远。

In cases and, suitability means that the procedure can, with reasonable certainty, detect and distinguish between polymorphs should they occur.

在情况和下，适应性表明方法，毫无疑问地可以检测出和定量测定多晶型和/或这些晶型混合物的溶剂合物，或测量出多晶型。

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。