Labelled atoms
[化] 标记原子; 示踪原子
🧩 词语组成解析
a. 贴上标签的
n. 原子（atom的复数）
🗣️ 情景例句
He is a good speaker of English.
他英语说得非常流利。
There are three terms in a school year.
一学年有三个学期。
Once in a while sailors came down, Kunta thought, to carry sick men upstairs for treatment.
偶尔水手下来，孔塔猜想是把生病的人抬上去进行治疗。