| 正面 | 6305.occurrence 英 [ə'kʌr(ə)ns]美 [ə'kʌrəns]     |
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| 背面 |     释义： 1. sed- "sit" => *sad- "sit" + 双写d加-le.2. => seat for a rider.n. 发生；出现；事件；发现 例句： 1. The greatest occurrence of coronary heart disease is in those over 65.65岁以上者是冠心病的最高发人群。 occurrence 发生，出现来自occur,发生，出现。 occurrence (n.)1530s, from Middle French occurrence "unexpected happening" or directly from Medieval Latin occurrentia, from Latin occurentem (nominative occurens), present participle of occurrere (see occur)." |