Activable tracer
[化] 可活化示踪剂
🧩 词语组成解析
a. [化]能被活化的
tracer
['treisə]
n. 追踪者，描图者，（铁笔等）绘图工具;
🗣️ 情景例句
You gave them to Richard.
你交给了Richard。
I asked him to play with me, but he wouldn't.
我请他和我玩，但是他不肯。
I want to buy some food for supper this evening.
我想买点晚饭用的东西。