save: implies the taking of measures to protect against danger of loss, injury, or destruction: ~d his papers in a vault.  （destruction彻底毁灭utter undoing, 如saw the rapid destruction of his entire life's work毕生心血毁于一旦）


preserve: stresses a resistance to destructive agencies and implies the use of methods and efforts to keep something intact or in existence: ~ food for winter use.


conserve: suggests a keeping sound and unimpaired and implies the avoidance of undue use or of waste or loss or damage: took every possible measure to ~ fuel.   （sound完好，强调没有任何疾病虚弱功能异常emphasizes the absence of disease, weakness, or malfunction，如an examination showed his heart to be sound检查表明他心脏功能完好）


save存储: 指采取保护措施以防止丢失损害破坏，preserve保存: 强调用某种方法抵御破坏力，使保存(intact原样保存无损，暗示危险容易破坏)，conserver也是保存:  指避免浪费或使用不当造成的损失


记忆方法: 1）首字母SPC想成PCS一件，如文物<==保存


2）保存的意思是维持安全免于伤害腐蚀损失mean to keep secure from injury, decay, or loss.