Discuss
When you discuss, you are required to have three systems to talk about. And you are expected to compare similarities and differences between the systems. The systems could be the same in many respects and only different in a couple of ways. Or they could be quite different and have very little in common. You might be expected to show the extent to which the systems are the same or different. Or you might be expected to compare the relative advantages and disadvantes of the things you are discussing. It depends on what you have been asked to discuss.
Common Sentence Structures Used in Discussions
Sentence structures that might be useful in these discussions include things like:
These two systems are very different in that a car is a mobile, mainly mechanical system and a form of transport while a computer is mainly electronic and intended for processing information. However, they both have sub-systems and the main reasons for the subsystems are the same in both cases: to make it simpler and more cost effective to design, build and maintain the overall system.
In a computer, most of the sub-systems are electronic, but in a car sub-systems can be mechanical, hydraulic, electronic or a mixture of all of these things.
A car has dozens of sub-systems whereas a simple robot has ….
These two systems differ in the number of sub-systems they have.
A plane and a car are similar in that many of the sub-systems on both are dedicated to controlling the motion of the vehicle.
However, a key difference between the sub-systems on a plane and those on a car is the fact that many sub-systems on a plane have to be duplicated to ensure the safety of the people aboard.