重要

appreciate

If you appreciate something, for example, a piece of music or good food, you like it because you recognize its good qualities. ^欣赏

If you appreciate something that someone has done for you or is going to do for you, you are grateful for it.
感激

ap- 在同辅音字母的词根前，表示"一再"等加强意义appreciate 欣赏（ap+reci 价值+ate→一再给价→欣赏）

appreciate 出现在下面的课文中: Lesson 26 The best art critics appreciate 动词: 鉴赏; Lesson 15 Fifty pence worth of trouble appreciate 动词: 欣赏，感激; Episode 1 46 Linden Street ACT I appreciate 动词: 感激、感谢; Lesson 41 Illusions of pastoral peace; Lesson 31 The sculptor speaks; Episode 1 46 Linden Street ACT II

单词造句:

appreciate: understand and enjoy ^{明白并能感到快乐(鉴赏)}

appreciate sth. ^感激……	I appreciate your help. ^{我很感激你的帮助} I appreciate it. ^我很感激
appreciate doing sth. ^{很喜欢做某事}	We could appreciate everything surrounding by leisurely.^{我们可以悠闲地欣赏周围的一切。}
in appreciation of .. ^{为了表达感激之情，以示感谢}	I sent him a gift in appreciation of his help.
be thankful / grateful to sb. for sth. ^{为某事向某人表示感谢}	I'm thankful / grateful to you for your help.
be obliged to sb. for sth. ^{为某事感谢某人}	I'm much obliged to you for your advice.
be indebted to sb. for sth. ^{为某事欠某人的情}	I'm deeply indebted to you for your encouragement.
owe ^{v.欠（钱、人情）}	I owe you (one). ^{（这次算）我欠你的。} I owe you a lot. I owe you a big favor.