Chemical tracer
[化] 化学指示; 化学指示剂; 化学示踪物
🧩 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
Could human beings one day be built on a production line just like any other products?
人类是否有一天会如其它产品般在生产线上生产？
What do you think of the proposal?
你的看法如何？
The film was set in California in the middle of the nineteenth century.
这部影片是以19世纪中叶加利福尼亚为背景的。