 explanation he said when their bodies were in that their joint appendages were made short. the reason for the shortness of these appendages is not because the bodies were in the wings and spines but rather so that the joints of this bead would be of some smoothness since the need for movement of the upper back is much greater than the need for movement of its lower back.
الشرح قوله فلما ذهبت جسومها في ذلك جعلت زوائدها المفصلية قصارا. السبب في قصر هذه الزوائد ليس لإذهاب الجسوم في الأجنحة والسناسن بل أن تكون مفاصل هذه الخرزة إلى سلاسة ما فإن الحاجة إلى حركة أعلى الظهر أكثر كثيرا من الحاجة، إلى حركة أسافله.