Tracer diffusion
[化] 示踪原子扩散
🧩 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
They have a good relationship.
他们关系不错。
He who has health, has hope, and he who has hope, everything.
身体好就有希望，有希望就有一切。
Where do you come from?
你是哪国人？