| 单词 | unusual occurrence |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔HAPPEN〕Earthquakes are an unusual occurrence in England but are not totally unknown. 在英格兰，地震很少发生，但也并非完全未发生过。朗文写作活用〔not〕This is a not unusual occurrence.这种事并不少见。外研社新世纪An eclipse is an unusual occurrence. 蚀是不常见的事情。译典通 |
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