1. Other factors may affect the process. 2. These organelles may accumulate energy. 3. They must have underestimated

1. Other factors may affect the process. — The process may be affected by other factors.
2. These organelles may accumulate energy. — Energy may be accumulated by these organelles.
3. They must have underestimated the result. — The result must have been underestimated by them.
4. They should have included other works in the review. — Other works should have been included in the review by them.