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
And now that you're satisfied with the performing arts section,
而且既然 对表演艺术这部分很满意，
Here are the two originals of the contract we prepared.
这是我们准备好的两份合同正本。
Take it easy!
别着急！