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
Vote for Ellen Stewart. She cares.
投Ellen Stewart一票。她关心。"
Our new car looks like a dream next to her old car.
跟旁边这些车比较，我们的新车如同一个梦。
Yes, that's right. Good!
对，正确，很好！