investigation
n
(a) [U] investigating or being investigated 调查研究
The matter is under investigation. 事情正在调查中.
It is subject to investigation, ie It must be investigated. 那事得进行调查.
(b) [C] ~ (into sth) instance of this 调查研究
Scientists are conducting an investigation into the causes of the accident. 科学家们就事故的原因正展开调查.
carry out fresh investigations 重新调查.