Luminous tracer composition
[化] 发光曳迹剂
🧩 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
Thank you, sir.
谢谢您，先生。
Having a sense of appreciation for all the people will keep us going on in business.
对所有人都抱一份感恩的心情会使我们的生意长盛不衰。
A Festival for the Dead is held once a year in Japan.
日本每年过一次“亡灵节”。