This problem is very complex and cannot be solved easily.

This circuit is very complex.

It is a very beautiful view.

I was amazed at his extraordinary talent.

Please press this button in case of emergency.

He is skilled in designing logic circuits.

This integrated circuit forms a major part of the computer.

The citric acid cycle plays a crucial role in the energy production of cells.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.