Radioactive substance
[化] 放射性物质\\n[医] 放射性物质
🧩 词语组成解析
🗣️ 情景例句
A journey of a thousand miles begins with a single step.
千里之行，始于足下。
He has gone home.
他已经回家去了。
Dressed in dark glasses and old clothes, they had taken special precautions so that no one should recognize them.
他们戴着墨镜，穿着旧衣裳，特别小心以防别人认出他们。