| 单词 | 七年一次 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔sabbatical year〕A leave of absence, often with pay, usually granted every seventh year, as to a college professor, for travel, research, or rest.公休假：大学教授每七年一次的通常带薪的休假，用于旅行、科研和休息美国传统〔septennial〕Occurring every seven years.七年一次的：每七年发生一次的美国传统 |
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