preservations

1.保存;保管;储藏;保护,防腐

2.保持;维护

1.the process of working to protect something valuable so that it is not damaged or destroyed; involved in preservation

2.the degree to which something has not been changed by the effects of time or weather

3.the process of trying to make a situation or state continue without changing

4.the addition of a chemical substance to food or wood in order to prevent it from decaying