In this time, the system might have undergone changes itself.

The system will undergo tests soon and is expected to be in full operation during the first half of next year.

The mounting system for the skin has undergone a number of changes over time.

A system undergoes a process when one or more of its properties changes.

As a system undergoes changes, its free energy will decrease.

Since then, the system of education has undergone transformation twice.

The system had apparently undergone modifications since it was set up.

The financial system in most western countries has undergone a remarkable transformation.

This can be viewed as the number of reactor changes the system is undergoing in one hour.

During that time the metric system had undergone a number of changes, particularly in science and engineering.