在一项实验中，研究者在一张纸上向所罗门·舍雷舍夫斯基展示了一个含有30个字母和数字的复杂公式。
In one experiment, researchers showed Shereshevskii a complex formula of thirty letters and Numbers on a piece of paper.
子项是字符信息项，即包含字母数字字符的项。
The child is the character information item, meaning that the item contains alphanumerical characters.
子项是字符信息项，即包含字母数字字符的项。
The child is the character information item, meaning that the item contains alphanumerical characters.
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