Prefsn.参数选择PREabbr.Petroleum Refining Engineer炼油工程师Pregnoein Sodium羟二酮钠[静脉麻醉药]pre-assignmentn.预分配premycotic stage蕈样前期preheat starting预热起动pre-experiment预试验pre-tax profit税前利润pregenital phase性器前期precompact space准紧空间pre-reservoirs前置库prematnre infant早产儿