Radiostrontium
n. [化] 放射性锶
🗣️ 情景例句
Good morning. My name is Richard Stewart.
早安。我叫Richard Stewart。
I met one of the cameramen over at the television station.
我在电视公司遇到一位摄影师。
For a beginner, you're pretty good.
做为一个初学者，你已经做得很好了。