名词
中文翻译：镤
同义词：
['plutonium', 'uranium-239', 'uranium-240例句：1. The scientists are studying the properties of protactinides to find new nuclear energy sources.（科学家们正在研究镤的性质，以寻找新的核能源。）2. Protactinides are rare and highly toxic', 'making them difficult to handle.（镤稀有且毒性高，因此难以处理。）']
例句：
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1. The scientists are studying the properties of protactinides to find new nuclear energy sources.
科学家们正在研究镤的性质，以寻找新的核能源。
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2. Protactinides are rare and highly toxic, making them difficult to handle.
镤稀有且毒性高，因此难以处理。
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3. The discovery of a new type of protactinide could revolutionize nuclear power.
发现一种新的镤类型可能会彻底改变核能。