Radioindicator
[化] 放射性指示剂
🗣️ 情景例句
Seeing as you are all so tired, we'll finish this lesson next time.
考虑到现在你们都很累了，这课我们下次接着讲吧。
This nation is noted for its scientific accomplishments.
这个国家以科学成就闻名。
'What a pity!' Susan exclaimed.
“真可惜！”苏珊大声说。