Smoking tracer mixture
[化] 发烟迹剂
🧩 词语组成解析
smoking
['sməukiŋ]
n. 吸烟，抽烟;
v. 冒烟( smoke的现在分词);抽烟;用烟熏制;吸（烟）;
tracer
['treisə]
n. 追踪者，描图者，（铁笔等）绘图工具;
🗣️ 情景例句
You haven't changed much in fifty years.
你五十年来没有什么变。
Can I speak to Mr. Li?
我能请李先生讲话吗？
Look, Gary!That policeman's waving to you.He wants you to stop.
瞧，加里！那个警察正朝你挥手呢。他要你停下来。