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She smiled and shook her head with pert insouciance .

她冒失而又漫不经心地笑了笑，又摇摇头。

An impression of boyish insouciance .

男孩子般无忧无虑的印象。

The very direness of this possibility has produced a certain insouciance .

这种可能性的可怕已经产生了某种漠不关心。

It has confirmed the insouciance of mediterranean countries , in particular , over the urgent need to improve their competitiveness .

特别的是，它证实了地中海国家对于提升它们国家的竞争力的紧迫需要的满不在乎。

The exercised mice did frequently freeze and hide , but they are prey animals , a situation that does not reward insouciance .

实验老鼠的确经常呆立不动并藏起来，但他们是捕食动物，一种不奖励漫不经心的情形。