Flame tracer
曳光弹
🧩 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
Because the United States is the most important trade partner.
因为美国是我们最重要的贸易伙伴。
Ouch! I fell down and cut my knee!
好痛呦！我跌倒割伤了膝盖！
People tend to amass possessions, sometimes without being aware of doing so.
人们喜欢收藏东西，有时并没有意识到自己在这样做。