短語詞組用作動詞 (v.)~+形容詞occur free 自由存在occur natural 天然存在副詞+~hardly occur 幾乎不發(fā)生just occur 剛剛發(fā)生never occur 從沒發(fā)生only occur 只存在~+副詞occur first 首先想到occur distressingly 令人痛苦地發(fā)生occur frequently 屢次發(fā)生occur historically 歷史性地發(fā)生occur incredibly 令人難以置信地發(fā)生occur marvelously 不可思議地發(fā)生occur normally 正常舉行occur occasionally 偶爾發(fā)生occur phenomenally 非凡地舉行occur readily 很快地舉行occur sporadically 不時地發(fā)生短語Occur Kill 突然殺;忽然殺;俄然殺occur r 發(fā)生;出現(xiàn);存在irritation occur 出現(xiàn)紅腫;發(fā)生過敏反應(yīng);出現(xiàn)過敏反應(yīng)occur as 以...的形式出現(xiàn)occur for 發(fā)生在…時候 返回 occur