Difference 1. Different interpretations:

Preservation: making things, properties, meanings, styles, etc. continue to exist without loss or change.

Safety:

1. Preservation and management.

2. People who do preservation and management work in warehouses.

3. Completely sure; guaranteed.

Reservation:

1. Save unchanged.

2. Leave it unprocessed for now.

Difference 2: Different usage:

Save: Save just means to deposit.

Keeping: Keeping means keeping and taking care of.

Reservation: Reservation is generally used to describe some ideas rather than physical things, such as reservations.

Extended information

1. Synonyms of preservation: store?[ chǔ cún]?

Explanation: (to store things or money) and not use them temporarily.

Quotation: Chapter 4 of the first volume of Liu Qing’s "History of Entrepreneurship": "When the diligent primary school graduate has nothing to do, he stores the soil for the cattle pen for busy days."

Explanation: supervision and management.

3. Synonyms of retention: maintain? [ bǎo chí ]?

Explanation: maintain (original) so as not to disappear or weaken.

Quotation: The first scene of Cao Yu's "Peking Man": "The furnishings of this room try to maintain the style of the year, and it does not feel shabby at all."?