thoughtful: may imply either the act of thinking in a concentrated manner OR the disposition to apply oneself to careful and serious thought about specific problems or questions: demonstrated a ~ mind.   (apply oneself to致力于)


reflective: suggests the use of analysis or logical reasoning with a definite aim: a philosopher of ~ bent. 爱好   (analysis分析是指从结果查找原因，是逆向的逻辑推理，logical reasoning没有译出。逻辑logical是指讲顺序orderly或sequential，而推理reason是指有逻辑即有顺序的思考)


speculative: suggests a tendency to think about things so abstract or unknowable that any conclusions are bound to be uncertain; the term often implies theorizing with little consideration of the evidence: theories about the origins of the universe that are as yet ~.            as yet至今迄今


contemplative: implies an attention fixed on the object of thought or a habit of mind: hoped for a calmer, more ~ life in retirement.  (contemplate还表示凝视,也是锁定目光未必要发现什么,只是欣赏凝神,如a relaxed moment contemplating the sunset轻松的凝视日落)  


meditative: suggests a tendency to ponder or muse over something but without necessarily any purpose other than pleasure: allowed himself the luxury of a few ~ minutes every day.  (muse也是冥想: 如梦幻回忆的想spent the afternoon musing over the legends of the knights一下午冥想(回味)骑士传说。Muse缪斯是希腊掌管文艺的女神,比喻灵感，博物馆museum)  (ponder: 长时间不一定有结果的想pondered the solution for the problem长时间考虑解决办法, ponder和muse在2017-12-27帖子中)


pensive: not always distinguishable from meditative, may carry suggestions of dreaminess, wistfulness, or melancholy: a rainy day conducive to ~ reflection. (wistful惆怅: 无法得到想要的东西而不开心，"If only I had known you then," he said wistfully"要是我那时认识你就好了", 他惆怅地说道)  (conduce to导致有助于a country setting conduces to relaxation乡村环境使人放松)    melancholy: sad同义词


thoughtful认真思考或有思想: 表示专注思考的动作或仔细思考的习惯(disposition性格即习惯)，reflective反思的: 指应用分析能力或逻辑推理(注见词条)，speculative猜测性的:  所思考的抽象或不可知，只能提理论无法提供证据，contemplative凝思: 是集中注意力想，但未必要追求什么结果，meditative冥想: 仅作为乐趣, 流行的休闲运动，pensive愁思: 和冥思有些接近, 表示如梦如愁，如秦观的"自在飞花轻似梦，无边丝语细如愁")


记忆方法: 1）首字母TRSCMP的TRS想成TRuthS真实，CMP想成CoMPare比较，比较真实<==知识来自多思


         2）多思的意思是专注思考mean characterized by or showing the power to engage in thought, especially concentrated thinking.