رَأَيْتُ هَذَيْنِ الطَّالِبَيْنِ.
Translation: I saw these two students.
هَذَيْنِ: accusative dual demonstrative, object marked by yāʾ. الطَّالِبَيْنِ: accusative apposition with yāʾ.
Yāʾ here marks the accusative because the verb makes the demonstrative its object.
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Demonstratives — forms, syntax and usage
رَأَيْتُ هَذَيْنِ الطَّالِبَيْنِ.
Translation: I saw these two students.
هَذَيْنِ: accusative dual demonstrative, object marked by yāʾ. الطَّالِبَيْنِ: accusative apposition with yāʾ.
Yāʾ here marks the accusative because the verb makes the demonstrative its object.