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Using 14C isotope trace and SDS-PAGE etc techniques research remobilization of carbon assimilate and compensative effects, and the relation of water and quality. 利用~(14)C同位素示踪和SDS-PAGE等技术对不同水分亏缺下碳同化物再动员与补偿效应、及水分与品质的关系做了初步探讨。
And the study on application of lead isotope tracing for city environment pollution sources can get a good result. 铅同位素示踪理论应用于城市环境污染源的研究,能够取得比较理想的结果。
In recent years lead isotope tracing has been playing its unique role in studying the source and migration of heavy metals in soil. 近年来铅同位素示踪在研究土壤中相关重金属来源及其运移途径起到独特的作用。
On single well's isotope trace in Runyang Yangtze river bridge 润扬长江大桥水文地质单井同位素示踪试验研究
This approach underpins much of my research on energy and nutrient flux, and has involved both natural abundance and enriched isotope tracing techniques. 该方法巩固了对于我在能量和营养流的研究，并结合了自然丰度和浓缩同位素跟踪技法。
The effect of moisture conditioning treatment parameters of brown rice on the water absorption rate of polished rice was studied based on isotope tracing. 该研究以糙米为原料,应用同位素示踪技术研究糙米加湿调质各工艺参数对精米吸水率的影响规律。
The direction,velocity and capacity of brine flowing through a well have been measured using lithium isotopic trace and isotopic dilution mass spectrometry. 采用锂同位素示踪技术，对察尔汗首采区采卤过程中晶间卤水的流向、流速和流量进行了测定。
The isotope tracing method can be used flexibly to measure the hydrogeological parameters of the aquifer at any time with the help of the existed long observing wells in the West Taijinar lake area. 同位素示踪法可以利用西台益湖区已有的长观井，机动灵活的随时监测含水层水文地质参数；
I can't trace that letter you sent me. 我找不到你寄给我的那封信。
He spoke without a trace of emotion. 他说话时毫不动感情。
Did the police find any trace of the murderer? 警方找到凶手的行踪了吗？
They failed to find any trace of the runaways. 他们未能找到逃跑者的任何踪迹。
There was barely a trace of salt in the soup. 汤里简直一点盐也没有放。
The post office tried to trace the lost letter. 邮局设法查出那封丢失的信。
The kids are learning to trace the letter. 孩子们学描字母。
He always spoke with a trace of sarcasm. 他说话总带着一丝讽刺。
The powerhouse was trace out accurately later on a large scale map. 后来发电站被精确地描画在大比例地图上。
The isotopic tracing technique is an advanced method in the research of photosynthesis of plants. 摘要同位素示踪技术是进行植物光合作用研究十分有效的手段。
A faint or fleeting indication; a trace. 模糊的暗示模糊的或一闪即逝的暗示; 迹象
A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素，尤指碳14。