同位素

As material,the absorption mechanism of~(32)P was studied,with isotopic tracer technique.

以温州蜜柑为试验材料，应用同位素示踪技术对磷的吸收机理进行了研究。

Heavy water is also used in research as an isotopic tracer for chemical reactions and biochemical pathways.

在实验研究中，可用作化学过程和生物化学过程的同位素示踪剂。

The application of stable isotope tracer technique has rapidly increased in clinical pharmacokinetic studies over the past two decades.

近二十年来，稳定同位素示踪技术在临床药代动力学研究中有了快速发展。

A short - lived , radioactive synthetic transuranic element produced from californium and having

铹一种寿命期短的、人工合成的放射性超铀元素，从锎中生成，有质量从255到260的同位素，半衰期从几秒钟到三分钟；原子序数

High frequent fluctuations of tree ring δ〓C series from Zhaosu are mainly effected by precipitation.

新疆昭苏树轮碳同位素序列的高频波动主要受降水的影响。

The isotopic ratio is incorporated as the tooth grows, leaving a record over time similar to tree rings.

同位素的比例随着牙齿的生长融入其中并随着时间的流逝留下记录，类似于树木的年轮）。

It is used to some extent in pharmaceutical industry (used as special catalyst to produce antibiotics) and chemical industry, esp. in production of cephalosporin (whose effect is better than boron trifluoride ethyl ether complex compound), and also used for most advanced science, such as abstraction of fuel with high energy and of isotope B10 as well as chemical reagent.

在制药工业(在医药上作为生产抗生素的专用催化剂)、化学工业等行业中都有不同程度的使用，尤其在头孢抗菌药类，效果优于三氟化硼乙醚络合物，亦用于尖端科学，如高能燃料的提取及提取同位素B10，也可用作化学试剂

Tritium is one of the mildest radioactive isotopes.

氚是最和缓的放射性同位素之一。

It was calculated that trophic level of macrofauna was between 2.0 and 3.7,and thus the macrobenthos of East Chongming tidal flat were primary and secondary consumers.

底栖动物的氮同位素能较好地反映其食性和营养位，计算出崇明东滩的大型底栖动物营养位在2.0～3.7，为一级消费者和二级消费者。

As regards environmental protection, WMO's Global Atmospheric Watch monitors the chemical composition of the atmosphere including greenhouse gases, the ozone layer and ultra-violet radiation, as well as long-range transport of pollutants, aerosols, reactive gases and radioactive isotopes.

在环境保护方面，WMO的全球大气监视网对包括温室气体在内的大气化学成分，臭氧层和紫外辐射以及污染物、气溶胶、再活化气体和辐射同位素的长期距离传输进行监测。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷