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
Well, thanks a lot.
那，多谢了。
This split-level house is for rent.It's a bargain.
这幢段层式的房子是出租的. 很便宜的。
Jim couldn't decide where to go for his holidays. He didn't go anywhere in the end.
几亩决定不了去哪渡假，最终他哪儿也没去。