You have to investigate into this affair.

你必须深入调查这件事。

youdao

OK, you make a report, and we'll investigate into this case right away.

好的，你写一份报告，我们会立刻调查这件事情。

youdao

The committee will earnestly investigate into the cases and seriously handle the cases.

该委员会正认真调查、严肃处理有关案件。

youdao

Ogden says the Justice Department will also investigate and prosecute those who smuggle guns and cash into Mexico.

VOA: standard.2009.03.24

The studies Mr. Noer cites are certainly cause to investigate more into the why's of these findings to further understand the issues and perhaps tailor some type of help for the couples at risk.

FORBES: Magazine Article

Mr Miliband said that the inquiries the government plans to establish - to investigate the police investigation into phone hacking and into press regulation and ethics more generally - should be set up immediately.

BBC: BSkyB bid referred to Competition Commission

Dr Marina Singh is sent into the Amazon to investigate the progress of a fertility study that her mentor from medical school, Dr Annick Swenson, is conducting in secret.

ECONOMIST: The call of the Amazon