tracer
/'treisә/
📖 中文释义
- n. 追踪者, 描图者, 描绘工具
- [计] 跟踪程序
🧩 词形变化
复数 tracers
📘 English Definition（英文释义）
- n. an investigator who is employed to find missing persons or missing goods
- n. an instrument used to make tracings
- n. (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes