/ɪnˌvestɪˈgeɪʃn ||; ɪnˌvɛstəˈgeʃən/noun
[C,U] (an) investigation (into sth) an official examination of the facts about a situation, crime, etc (官方)调查,审查,研究:
The airlines are going to carry out an investigation into security procedures at airports.航空公司将研究机场的保安程序。The matter is still under investigation.事情仍在调查阶段。