"tracers" in Chinese (Simplified)
曳光弹示踪剂
Definition
曳光弹是特殊子弹，可留下发光轨迹让人看到其飞行路径；在科学和医学中，示踪剂用来追踪身体内的过程或流动。
Usage Notes (Chinese (Simplified))
军事场合中，'tracers' 指曳光弹。医学/科研中，指示踪剂（可能是放射性或荧光）。勿与 'trackers'（追踪者）混淆。常见搭配：'使用tracers'，'radioactive tracers'。
Examples
The soldiers fired tracers at night to see where the bullets went.
士兵们晚上发射了**曳光弹**以观察子弹的轨迹。
Doctors use radioactive tracers to take images of organs.
医生用放射性**示踪剂**拍摄器官影像。
Some tracers glow in the dark when they are fired.
有些**曳光弹**发射时会在黑暗中发光。
We could see the tracers streak across the sky during the firefight.
在交火时，我们能看到**曳光弹**划过天空。
Scientists inject chemical tracers to map how blood moves through the heart.
科学家注射化学**示踪剂**来追踪血液在心脏中的流动。
They added colored tracers to the water to study ocean currents more easily.
他们往水里加了有色**示踪剂**来更好地研究洋流。