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
I think I've caught a cold.
我觉得我感冒了。
May I see your boarding pass?
我能看你的登机牌吗？
There's something wrong woth your ears. I think there's something near us.
你的耳朵有点毛病！我想我们附近有什么东西。