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
Good afternoon, Mrs. Green. I'd like you to meet my girlfriend, Sally.
格林太太，下午好。我想让你认识一下我的女朋友萨里。
By the way, before leaving this subject, I would like to add a few comments.
在结束这个问题之前顺便一提，我希望能再提出一些看法。
After working hard during the day I like to relax in the evening.
白天干了一天，晚上我要放松一下。