In general relying on excessive detail or jargon is symptomatic of not really understanding something when required to explain things in simple terms. I believe Richard Feynman said as much.
The general idea is people hide behind that detail/jargon precisely because they don't REALLY understand it enough to explain in simple terms what it is. That doesn't mean everything IS simple of course.
I assume you know now but in simple terms: the clutch connects the engine to the gearbox (transmission), so how well the clutch is engaged (connected) helps control speed. Gears multiply (increase or decrease) power from the engine depending on the gear you've selected.
The general idea is people hide behind that detail/jargon precisely because they don't REALLY understand it enough to explain in simple terms what it is. That doesn't mean everything IS simple of course.
I assume you know now but in simple terms: the clutch connects the engine to the gearbox (transmission), so how well the clutch is engaged (connected) helps control speed. Gears multiply (increase or decrease) power from the engine depending on the gear you've selected.