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
78 percent of black high-school graduates are unemployed.
百分之四十八的黑人高中毕业生失业。
Don't drop that bottle on the floor.
别让那只瓶子掉到地上。
I've never met him but I've talked to him on the net.
我没见过他，但我和他在网上聊过天。