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
OK, what do you need most of all?
好， 你们最需要的是什么？
The devil is not so black as he is painted.
魔鬼不像所描绘的那么黑。
The policeman in question was severely reprimanded and was informed that if any further complaints were lodged against him, he would prosecuted.
当事的警察受到严厉的斥责，并被告知，如果再有人投诉他，他将受到起诉。