conservation、preservation、reservation、observation这几个词怎么区别?尤其

conservation、preservation、reservation、observation这几个词怎么区别?尤其 conservation、reservation和preservation有区别吗?区别是什么? preservation与conservation的区别 preservation与reservation都有保留；保存的意思,二者怎么区别? reservation conservation protection 有什么区别 protection 和 preservation 的区别? conservation和protection的区别 public reservation怎么翻译? observation reservation appointment 有什么区别 reservation 词"其实"和"尤其"的区别