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
I apologize.
我道歉。
What is bothering you?
什么在困扰你？
Combining exercise with the diet may be the most effective way to lose weight.
运动与节食结合也许是减肥最有效的途径。