Complex sentence: When a joint is released, balancing moment occurs to compensate the unbalanced moment which is initially the same as the fixed-end moment, and this balancing moment is also carried over to the member's other end.
Split into simpler sentences: When a joint is released, balancing moment occurs to counterbalance the unbalanced moment which is initially the same as the fixed-end moment. This balancing moment is then carried over to the member's other end.