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
you, and the rest of our family.
你和我们家的其他人。
I don't think you'll have any difficulty in pushing sales.
我认为你推销时不会有任何困难。
A cat's ability to survive falls is based on fact.
猫在跌落时能够大难不死是有事实作为依据的。