Radioactive tracer
[化] 放射性示踪剂
🧩 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
Try to think in English whenever possible.
尽可能用英文思维。
Education begins a gentleman, conversation completes him.
人的教养始于教育，成于社交。
He has to deduce what he can from the few scanty clues available.
他们必须根据现有的不充分的线索进行推理。