1. 关于
    You use concerning to indicate what a question or piece of information is about.

    e.g. For more information concerning the club contact I. Coldwell.
           咨询俱乐部详情，请与I.科德维尔联系。
    e.g. ...various questions concerning pollution and the environment.
           有关污染和环境的各种问题

2. 让人不安的;令人担忧的
    If something is concerning, it causes you to feel concerned about it.

concerning的近义词

    e.g. It is particularly concerning that he is working for non-British companies while advising on foreign policy.
           让人尤为不安的是，他在提供外交政策咨询的同时却又供职于一些外国公司。