| 单词 | vicennial |
| 释义 | Word Frequency vicennial(vɪˈsɛnɪəl) adjective 1. occurring every 20 years 2. relating to or lasting for a period of 20 years Word origin C18: from Late Latin vīcennium period of twenty years, from Latin vīciēs twenty times + -ennium, from annus year |
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