satisfy: implies adequacy to an end or need in view and often suggests a standard of comparison: ~ied all the requirements for her degree. （adequate足够的，足够多足够好=enough; enough in quantity, or good enough in quality表示"刚好"满足足够，来自词根ad=to去，词根equ=equal相等，如the room was small but adequate房间虽小但够用，如he didn't give an adequate answer to the question他没有对这个问题作出满意的答复, 如one in four people worldwide are without adequate homes全世界有1/4的人没有个像样的家，adequate程度不及sufficient) standard标准，泛指用来测量衡量的规则准则等applies to any rule or principle by which the quality, worth, or nature of something can be measured，如the book is a classic by any standard以任何标准衡量，那本书都是经典
fulfill: often interchangeable with satisfy, may imply more abundance or richness in measuring up to a need that is less calculable, more immeasurable: a son who ~ed his father's fondest hopes. (rich丰富富裕more than enough to gratify normal needs or desires超过一般需求，如a rich country富裕国家，如a rich supply丰富的供应； abundance和rich完全同义，如a woman of abundant energy精力充沛的女人，如the area has an abundance of wildlife这片地区有丰富的野生动植物) 又如fulfill my potential发挥自身潜力/their ambitions实现抱负/their promises履行诺言/the plan实现计划/your obligation履行义务/my dream实现梦想/a role发挥作用
meet: implies an exactness of agreement between a requirement and what is submitted to fill it: designed to ~ the demands of today's students. exact准确严格implies very strict agreement with a fact or standard和事实或标准严格一致, 如a suit tailored to exact measurements严格量身定制，exact这个词十分常用，建议背下来
answer: usually implies the simple satisfaction of a demand, need, or purpose often in a temporary or expedient manner: a solution that ~ed their immediate need.
satisfy满足: 指针对目标需求而言足够，常指有标准（standard of comparison用于比较的标准），fulfill充分满足: 指更充分，也更难衡量地满足，meet精准满足: 指和需求完全(exact严格)一致，answer简单满足: 常指简单暂时权宜性地满足
记忆方法: 1）首字母SFMA想成AS FM做外长<==满足
2）满足的意思是达到标准或要求mean to measure up to a set of criteria or requirements. (measure up to达到要求符合to be as good as needed or expected，如he measures up to his job in every way他在各方面都很称职，如you must see to it that all the goods measure up to the specifications你们得保证所有商品都符合规格)
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