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英语单词“radium”的意思是：镭；读音为英 [ˈreɪdiəm]、美 [ˈreɪdiəm]。
例句：It was in 1898 that Marie and Pierre Curie discovered radium.
翻译：1898年，居里夫人和居里先生发现了镭。
单词“radium”可以用在多种情境中，以下是它的十个例句：
1. Radium is a radioactive element that emits radiation.
2. Radium has been used in medical treatments for some time now.
3. The process of mining radium can be hazardous to workers.
4. Radium is found in small amounts in many minerals.
5. Scientists are still studying the properties of radium and its compounds.
6. Radium has been used in radiation therapy for many years.
7. The amount of radium in the environment is constantly changing.
8. Radium is a highly reactive element that reacts with air and water.
9. The half-life of radium is relatively short, which means that it loses its radioactivity over time.
10. Radium is used in some types of paints and enamels because of its high luminance and stability.
以上这些句子涵盖了镭的性质、发现历史、应用、环境影响等多个方面，帮助您更全面地理解这个单词。
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