擅自侵入和小偷小摸的行为经常出自于男孩子们对私有财物漫不经心的轻视态度。
Acts of trespass and petty theft often grew out of the blithe disregard that boys had for private property.
他们对自己的车技充满信心，以致漫不经心。
他对任何事情都漫不经心的态度使我们很反感。
His casual attitude toward everything has really put us off.
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