但是科学家们无法知道会产生什么影响，Fievet说，因为在实验室中安全地操作这些放射性同位素非常困难。
But scientists just don't know what the effects will be, Fievet says, because handling these radionuclides is just too hard to do safely and efficiently in the lab.
在实验室中用同位素示踪法，研究了土壤中不同石油污染量对氮矿化及硝化速率的影响。
Isotope dilution method was adopted in lab for the study of the effect of crude oil contamination on the rate of nitrogen mineralization and nitrification in soil.
在实验室中用同位素示踪法，研究了土壤中不同石油污染量对氮矿化及硝化速率的影响。
Isotope dilution method was adopted in lab for the study of the effect of crude oil contamination on the rate of nitrogen mineralization and nitrification in soil.
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