4周搞定2000+托福核心词
裂变
fission
常考释义
As Masurium, it was the first element discovered that occurs in nature only from spontaneous fission, and as Technetium, it was the first element discovered in a laboratory.
作为Masurium，它是首次从自然裂变中发生的自然元素，作为Technetium，它首次在实验室发现。
来源于：听力OFFICIAL8 L4n. 裂变；分裂；分体；分裂生殖法
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