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的人。

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.

梧长出新叶， 空气中弥漫着巴黎特有的悠闲、轻松和活泼的感觉。

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，在她的眼中，犯罪是以一种相当漫不经心的轻松态呈现的，一种似乎没有考虑到正在发生的事情的意义的正念程。