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radioactive tracer element 放射性示踪元素
The major difference between the two is that instead of a positron-emitting substance, SPECT uses a radioactive tracer that emits high-energy photons. 这两种技术最大的区别在于，单光子发射计算机化成像不用发射正电子的物质，而是用一个能发出高能量光子的有放射性的跟踪剂。
The major difference between the two is that instead of a positron-emitting substance,SPECT uses a radioactive tracer that emits high-energy photons. 这两种技术最大的区别在于，单光子发射计算机化成像不用发射正电子的物质，而是用一个能发出高能量光子的有放射性的跟踪剂。
The rectified de background clearance curves obtained using 133 Xe as radioactive tracer were similar to those obtained using 99m Tc as tracer. 用吸入133Xe示踪剂法得到的G负荷去本底清除曲线，经校正后，与用注射99mTc法测得的G负荷血容曲线很相似。
When they reached a transcendental high, they were asked to pull a kite string to their right, releasing an injection of a radioactive tracer. 当他们达到超越的高度，他们被要求去拉一条风筝线到他们的右侧，释放放射性追踪器的注射剂。
The chemical tracer, especially the perfluorocarbon tracer and sulphur hexafluoride, has been used much more popularly than the radioactive tracer nowadays. 化学示踪剂已取代放射性示踪剂在混相驱中的主导地位，其中，全氟环烷烃和六氟化硫是目前现场广泛试验和应用的化学气体示踪剂。
A radioactive tracer. 放射性追踪剂
The use of radioactive tracers to study biological processes. 用放射性追踪的使用来研究生物进程。
The cited reports cover the research on the lower atmospheric air pollution movements by using the tracer elements. 所引用的报告包括示踪元素研究大气层污染移动的研究。
Patients are given radioactive tracers (via an IV or inhaled as a gas) that send out signals, which are picked up and deciphered by the PET scanner. 病人通过静脉注射或者吸入的方式被给予放射性示踪剂，然后放射性示踪剂发射出的射线可以被PET探测器探测到并解码。
Keywords Parkinson disease;Annexin V;apoptosis;radioactive tracer; 关键词帕金森病;膜联蛋白V;凋亡;放射性示踪剂;
Additional "rays" for this purpose were discovered, including ultrasound and radioactive tracers, and contrast agents were developed to reveal previously indiscernible structures. 为了达到这一目的，除了放射线，还有超声和放射线示踪器和造影剂在揭示先前看不见的结构的过程中发展起来。
A naturally occurring or artificially produced radioactive element. 放射性元素自然产生或人为制造的放射性元素
The immediate product of the radioactive decay of an element. 继承元素某种元素放射性衰变的直接产物
In a printer, the removable type element. 印刷机上可拆卸的打印部件。
Radioactive ray is material thing. 放射线是实际的物质。
Study on sorption, desorption behaviors and enrichment mechanism ofiridium in marine sediments by radioactive tracer 用放射性示踪技术研究海洋沉积物中铱的吸附和解吸行为及其富集机制
He's in his element when playing badminton. 他打起羽毛球来真是得心应手。
RADIOACTIVE TRACER STUDY ON THE PHOTOCHEMICAL REACTION OF ~(14)CS_2 WITH OH IN THE PRESENCEOF O_2 放射示踪法研究O_2存在时~(14)CS_2与OH的光化学反应
This heater needs a new element. 这个加热器需要一组新电阻丝。