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
He takes offense at little things.
他为琐事生气。
Beggars must be no choosers.
饥不择食。
so that there are heavy odds in favour of our dying between the ages of sixty-five and eighty.
我们最可能死亡的年龄在65至80岁之间，