explicit: implies such verbal plainness and distinctness that there is no need for inference and no reason for ambiguity or difficulty in understanding: the dress code is ~.        plain语言浅显      （distinct明显implies such a sharpness of outline or definition that no unusual effort to see hear, comprehend is required十分清晰显而易见，如distinct improvement/pronunciation/voice明显进步/清晰发音/嗓音）


express: implies both explicitness and direct and forceful utterance: her ~ will was to be cremated.


specific: applies to what is precisely and fully referred to or treated in detail or particular: two ~ criticisms of the proposal.         in detail=detailed详细具体，又如a detailed account详细具体的叙述，a detailed problem千头万绪的问题    in particular具体，和in detail同义，更强调具体
  

definite: stresses precise, clear statement or arrangement that leaves no uncertainty or indecision: the law is ~ regarding this case.   uncertainty, indecision含义不显著，未译出     arrange安排     (definite就是clear, 就像specific就是detailed，请死记)


explicit明确: 指语言浅显清晰无歧义不难理解无需推理，express明确表示: 指既明确又直接有力地表达，specific具体: 指具体说明，specific清晰: 指清楚说明，不留疑问


记忆方法: 1) 首字母刚好是SEED种子<==明确

               2) 明确的意思是意思清晰mean perfectly clear in meaning.首字母刚好是SEED种子<==明确        （clear清楚清晰implies absence of cloudiness, haziness, or muddiness指没有云雾泥，如clear water清澈的水，如clear meaning意思清晰）