Radioactive tracer
[化] 放射性示踪剂
🧩 词语组成解析
tracer
['treisə]
n. 追踪者，描图者，（铁笔等）绘图工具;
🗣️ 情景例句
That's good, I thought I was late.
太好了，我还以为我来迟了呢。
It will help me understand the point you are trying to make.
这会帮助我了解你们的重点。
They have found that it is connected with the passage of days and the phases of the moon.
他们发现代码与昼夜更迭和月亮圆缺有关，