The idea that electricity cannot be created or destroyed may seem to imply that electrons and protons cannot be created or destroyed.
举一反三
- Atoms can be neither created nor destroyed during a chemical change
- In general, positional goods cannot be created,only redistributed, while material goods can be created with time and effort.（ ）
- Charge can be created or destroyed.
- Energy can be created or destroyed.
- Since time cannot be created, we need tomake choices and make a plan.