Tracer atom
[化] 示踪原子
🧩 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
It's about moving to Los Angeles.
是关于搬家到Los Angeles的事。
Thanks guys, you won the games for us.
谢谢大家，能赢得比赛，委实是托大家的福。
They help their parents to open their stockings, too.
他们还帮助父母打开他们的袜子。