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
I've never been there, Robbie,
我从来没有去过那儿， Robbie
The post office is two blocks straight ahead, You can't miss it.
那邮局一直向前走过两条街，很好找。
And I want these price lists as well.
还有这些价目表我也要。