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
Am I getting a good deal on this?
这买这个值吗？
One cloud is enough to eclipse all the sun.
一叶可障目。
'Could I have those two tickets please?' I asked.
“我可以买那两张票吗？”我问。