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
someone to sign for the loan for you.
找个人为你们的贷款签个名。
Grain by grain and hen fills her belly.
一粒一粒啄米，母鸡填饱肚皮。
Sorry. I had a little, but I don't feel like eating.
对不起。我吃了一点儿，我不想吃。