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
Oh, it was nothing. I'm glad she liked it.
嗯，小意思。她喜欢就好。
I'd like a refund.
我要想退款。
It is impossible to look for life on another planet using earth-based telescopes.
使用放置在地球上的望远镜是无法观察到其他行星的生命的。