tracer
音标['treisә] 读音
汉语翻译
n. 追踪者, 描图者, 描绘工具【计】 跟踪程序
【化】 示踪剂
【医】 示踪器; 示踪物; 描记器
英语解释：
名词 tracer:
- an investigator who is employed to find missing persons or missing goods
- an instrument used to make tracings
- (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes
- ammunition whose flight can be observed by a trail of smoke同义词：tracer bullet
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