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
Money is something, not everything, but without money, you cannot do anything in this world.
金钱并不是万能的，但没钱是万万不能的。
Mike is already a junior.
迈克已经大学三年级了。
Ouch!
哎哟！