A little more lightheartedness would render me the happiest being under the sun.

再轻松一点， 我就是天底下最幸福人。

The plane trees were just bursting into leaf and there was in the air that sense of leisure, lightheartedness, and alacrity that was peculiar to Paris.

梧桐树刚刚长出新叶， 空气中弥漫着有、轻松和活泼感觉。

Through her eyes, however, the crimes are presented with a rather careless lightheartedness, with a level of mindfulness that does not seem to consider the meaning of what is happening.

然而，在她眼中，犯罪是以一种相当漫不经心轻松态度呈现，一种似乎没有考虑到正在发生事情意义正念程度。