a.

1. 不担心的，不在乎的[（+about）]
   Tom seems quite unconcerned about his own future.

   汤姆似乎对自己的前途抱无所谓的态度。

2. 不感兴趣的，漠不关心的[Z][F][（+with）]
   be unconcerned with politics

   对政治不感兴趣

3. 无关的；未介入的[Z][F][（+with）]
   The report is unconcerned with details.

   报告未涉及细节。

adj.