在研究中所有被确证的三个家庭中研究者发现患者有各种不同类型的基因突变。
In all three families identified in the study, the researchers found they had various types of mutations in the gene.
部分串联复制是基因突变的一个类型，当一个基因片断重复时发生，就像停顿基因。
A partial tandem duplication is a type of gene mutation that occurs when a section of a gene is repeated, like a stutter in the gene's DNA.
研究表明，辐射可以造成不只是一个，但各种不同类型的基因突变。
Studies show that radiation can cause not just one, but a variety of different types of mutations .
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