n. 无忧无虑
n. 无忧无虑；漫不经心；满不在乎
1、He maintained a calm insouciance.
他依旧镇定自若。
2、President Barack Obama stated, with unilateralist insouciance, that FIFA had made the wrong choice.
美国总统奥巴马宣称，国际足联做了一个错误得决定。