Tracer bullet
曳光子弹
🧩 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
Do you have any plans after class today?
今天下课后你有什么安排吗？
Hurray!
万岁！
Come upstairs and see it.
到楼上来看看吧。