Tracer composition
[化] 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
What are you trying to say?
你想说什么？
Has everybody got a sheet?
每个人都拿到材料了吗？
They killed the bison, cut off the skins and left the bodies behind to rot.
他们把野牛杀死剥皮，尸体就任其腐烂。