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
What's your new job like?
你的新工作是什么性质？
I agree. I wish it were cheaper.
是这肃，我真希望它能便宜点。
If Tom cannot keep his promise, he'll lose face.
如果汤姆不能信守诺言，他就会丢面子。