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
Don't tell me.
别告诉我。
When are you off?
你什么时候动身？
Other Indians were killed when police officers fiercely attacked their political marches.
警察官员们猛烈攻击印度人的政治游行时，另一些印度人被杀害。