Tracer technique
[化] 示踪技术
🧩 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
Please cash this check.
请兑现这张支票。
I was at home all afternoon.
我整个下午在家。
Thanks.
谢谢！