"Could" is often used to make a polite request: Could you please turn off the television? Could I have a few minutes to look at my notes? (Sometimes, "could" and "would" are used interchangeably, but not always -- you can certainly say "Would you please turn off the television?" But you can not say "Would I have a few minutes to look at my notes?")
Another use for "could" is to show that you may be able to do something, but you are not 100% certain: I think I could finish this project by tomorrow. Maria could probably get to the meeting by two o'clock. And "could" is also used to show that something is possible: He could get an "A" if he studied harder. This could be a great opportunity.
Jewelry and you could sell
They could be used in battle.
It could be the resistor, if it uses one, it could be the switch, it could be the relay if it uses one, it could be wiring or connectors or if it uses multiple motor windings to control speed it could be the motor. The Blower Motor Resistor Pack is defective. Replace it.
If the cable on your mouse can be unplugged and uses a Mini Din6 connector, you could use it.
Your question is itself a sentence which uses the word "could".
You could boil them, which only uses boiling water, no fat or you could poach them which also uses boiling water, so no fat :)
The person could be depressed.
An infant could answer this question.
It means it is fool.
It could be cavier! yummy
It could be used as an x-axis.
Many animals uses their odor as a weapon. You could surely find many on the internet.