1、研究的对象是
concern oneself with 研究的对象是；关心，关注· ；从事，忙于· · ；参与，干预 ·dig oneself in 【军事】挖壕固守；巩固自己的地位，使自己站住脚 .
2、忙于
忙于； 从事； 关心， 关切 concern oneself with sth. 忙于； 从事； 关心， 关切 .
3、关心
... be concerned with：关心；挂念；从事于 concern oneself with：关心 unconcerned：不关心的；不关注的 ...
4、从事
concern oneself with 研究的对象是；关心，关注· ；从事，忙于· · ；参与，干预 ·dig oneself in 【军事】挖壕固守；巩固自己的地位，使自己站住脚 .
concern oneself with sth从事;沉溺于某事物
to concern oneself with结记
concern oneself about with关心
Not Concern Oneself With不关心
concern oneself with state affairs关心国家大事
concern oneself with trivial matters拘泥于小节
concern oneself with welfare projects让自己
concern oneself with welfare project关心福利事业