Complex sentence: Most exoskeletons pictured in this article typically show a fixed length distance between joints, but humans exhibit a wide range of physical size differences and skeletal bone lengths, so a one-size-fits-all fixed-size exoskeleton would not work.
Split into simpler sentences: Most exoskeletons pictured in this article typically show a fixed length distance between joints. But humans exhibit a wide range of physical size differences and skeletal bone lengths, so a one-size-fits-all fixed-size exoskeleton would not work.