Complex sentence: Bomber B intended to replace the Junkers Ju 88 with a design that was larger, offer cabin pressurization for high altitude work, have longer range, a much greater warload, be even faster, and have improved defensive firepower.
Split into simpler sentences: Bomber B intended to replace the Junkers Ju 88, with a more modern design. The Ju 288 would be larger, offer cabing pressurization for high altitude work, have longer range, a much greater warload, be even faster, and have improved defensive firepower.