名词
中文翻译：弹道铅
同义词：
['tracer bullet', 'tracer pellet例句：1. The ballistic lead was used to mark the target during the shooting practice.（在射击练习中，弹道铅被用来标记目标。）']
例句：
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1. The ballistic lead was used to mark the target during the shooting practice.
在射击练习中，弹道铅被用来标记目标。
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2.The tracer bullets were fired at the target to help the marksman improve his aim.
发射的曳光弹被射向目标，帮助射手提高瞄准技巧。
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3.The tracer pellets helped the scientist to study the movement of the projectile.
曳光弹丸帮助科学家研究弹丸的运动轨迹。