You could see the occasional solitary figure making a study of wildflowers or grasses.

你偶尔可以看见那个研究野生花草的孤独身影。

《柯林斯英汉双解大词典》

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A separate study, also published in "sleep", showed that an occasional long lie-in can be beneficial for those who can't avoid getting too little sleep.

发表在期刊“睡眠”上的另一个研究表明，偶尔的赖床对这些不能避免睡得太短的人有益。

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Stoudemire's highly efficient play of late seems almost certain to draw occasional double teams from opposing defenses as they study the Knicks on film going forward.

WSJ: The Knicks' $100 Million Backup Plan