详细解释:a. 无约束的, 无忧无虑的, 未解恋爱滋味的, 天真无邪的
英语解释：
形容词 fancy-free:
having no commitments or responsibilities; carefree详细解释：
fan.cy-free
adj.（形容词）Having no commitments or restrictions; carefree.随心所欲的：无义务或约束的；无忧无虑的Not in love or married; unattached.未婚的：没有谈恋爱或未结婚的；未婚的