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n.发生,出现;遭遇,事件; 变形: 复数:occurrences 双语释义:n.(名词)[U]发生,出现 the process of happening[C]事件,发生的事 an event; happening英英释义: occurrence[ ə'kə:rəns, -'kʌ- ]n.an event that happens同义词:happeningoccurrentnatural eventan instance of something occurring"a disease of frequ