concerning       
 preposition  formal uk/kənˈsɜː.nɪŋ/ us/kənˈsɝː.nɪŋ/
B2 关于
about
  I've had a letter from the tax authorities concerning my tax payments. 我收到了税务部门寄来的关于我纳税情况的一封信。 
 - More examples
 - We wish to remove any ambiguity concerning our demands.
 - They have been lobbying Congress to change the legislation concerning guns.
 - I have received several letters concerning the proposal for a new road in the area.
 - Has Margaret spoken to you concerning the new computers?
 
concerning       
adjective  formal not standard uk/kənˈsɜː.nɪŋ/ us/kənˈsɝː.nɪŋ/
 使担心的
making you feel slightly worried
  The increase in crime in the area is very concerning. 该地区犯罪率的上升十分令人担忧。