Nonactive
稳定的, 非放射性的
🗣️ 情景例句
After studying an hour, I finally got the hang of the lesson.
我学习了一个小时，终于理解了这一课的要点。
We'll have to check these rates against those charged by other suppliers.
我们必须核查一下由其他供应商提供的费率。
He told him he had better return it or he would call the police.
告诉他最好把羊交还，否则就去叫警察。