Owl的字面意思是“猫头鹰”

【例句】 　
A night owl means a person who prefers to be awake and active at night. 　　猫头鹰
和夜猫子一样，白天睡觉，夜晚清醒。 　

When the important exams come，Jack becomes a night owl . 　　
当有重要考试时，杰克就变成了一只夜猫子。