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
The firm isn't making out as well as was hoped.
公司并不像原来期望的那样进展顺利。
It is never too late to learn.
什么时候学习都不晚。
I can't have been.
我不会开得那么快的。