radio-labelled compound

例句：

1. 1. The radio-labelled compound was used to track the movement of the molecules.
   这种放射性标记化合物被用来追踪分子的运动。
2. 2. The research team used the radio-labelled compound to study the effects of radiation on cells.
   研究小组使用这种放射性标记化合物来研究辐射对细胞的影响。
3. 3. The radio-labelled compound was used as a tracer to detect the presence of pollutants in theenvironment.
   这种放射性标记化合物被用作示踪剂，以检测环境中污染物的存在。