appreciation/əpriːʃɪˈeɪʃ(ə)n/
n.1. 评定；评价；鉴赏Appreciation of works of art is bound to be dominated by a particular kind of interest.对于艺术作品的欣赏必然受到一种特殊的兴趣爱好的支配。
2. 鉴定书；评价报告3. 感激；感谢She showed an appreciation of my help.她感谢我的帮助。
4. （财产等）增值appreciation of a currency货币升值