pleasant: stresses a quality inherent in an object: a ~ evening.


pleasing: close to pleasant, stresses the effect that something has on one: a ~ arrangement of colors.


agreeable: applies to what is in accord with one's tastes or liking: an ~ companion.      in accord with符合       同伴


grateful: implies satisfaction, relief, or comfort yielded by what is pleasing or agreeable: the fire threw a ~ warmth into the room.


gratifying: implies mental pleasure arising usually from a satisfying one's hopes, desires, conscience, or vanity: a ~ sense of accomplishment.         conscience良知vanity自尊心虚荣，由于二者属于hopes, desires，所以没有再译出  


welcome: is stronger than pleasing and grateful in stressing the pleasure given by satisfying a prior need or longing: as ~ as rain after a long drought.


pleasant愉快的: 强调内在属性，pleasing愉快的: 意思接近，但强调效果，agreeable愉快的: 指符合品味喜好，grateful值得感谢的: 使人满意放松舒适，gratifying: 内心愉悦，因满足愿望，welcome欢迎的: 程度更强，强调满足之前的需求和渴望


记忆方法: 1) 首字母WAPPGG想成我爱苹果苹果<==愉悦

        2) 愉悦的意思是令人思想或感觉上快乐mean highly acceptable to or delighting the mind or senses.首字母WAPPGG想成我爱苹果苹果<==愉悦