据说爱因斯坦小时候学习迟缓。

Einstein was said to be a rather slow learner in his boyhood.

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之前的研究表明，SHANK3的基因突变与语言能力发育迟缓、学习障碍和泛自闭障碍症有关。

Previous research has shown that gene mutation in SHANK3 is associated with delayed language abilities, learning disability, and ASDs.

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后来，这对夫妻生下了两个儿子，两名男孩的学习能力都发育迟缓。

Later, the couple had two sons, both of whose learning abilities are stunted.

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