单词	semicentennial
释义	sem·i·cen·ten·ni·al (sĕm′ē-sĕn-tĕnē-əl, sĕm′ī-) adj. Marking the 50th anniversary of an event. n. A 50th anniversary or its celebration.
随便看	observation observational observationally observatory observe observer observingly obsess obsession obsessional obsessionally obsessive obsessive-compulsive obsessive-compulsive disorder obsessive-compulsive personality disorder obsessively obsessiveness obsessor obsidian obsolesce obsolescence obsolescent obsolescently obsolete obsoletely

英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。