副词短语
中文翻译：偶尔
同义词：
['occasionally', 'now and then', 'from time to time']
例句：
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1. She goes for a bike ride every so often.
她偶尔骑自行车去。
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2.He comes here occasionally to visit his old friend.
他偶尔来这里看望老朋友。
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3. We need to take care of our health every so often.
我们需要时不时地照顾好自己的健康。