形容词
中文翻译：偶尔的
同义词：
['occasionally', 'occasionally']
例句：
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1.She has a tendency to be absent-minded when she's not careful.
她如果不小心，就容易心不在焉。
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2. The book is an occasional source of comfort for me.
这本书是我偶尔的安慰来源。
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3. He usually attends the meeting only on occasions when he's free.
他通常只在有空的时候参加会议。