investigate into

基本解释

The committee will earnestly investigate into the cases and seriously handle the cases.
該委員會正認真調查、嚴肅処理有關案件。
www.fmprc.gov.cn
Deputy Party Secretary of Baoding City, Li Jianfang, pledged to investigate into what he called an inherited problem and vowed to bring to justice whoever is responsible.
保定市委書記李劍方，承諾將調查他稱之爲（繼承權？）的問題，竝將責任人員繩之以法。
blog.sina.com.cn
Earlier, the US spokesperson of Department of Defense also pressed/challenged Chinese Government to investigate into the cyber hacking targeting Google and other companies.
此前美國國防部發言人提出，希望中國政府對包括穀歌在內的企業遭黑客攻擊行爲進行調查。

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

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
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
Seizing upon a request by the Electronic Privacy Information Center to investigate, FCC last week injected itself into the Google Street View matter and, if we may extrapolate, the larger issue of internet privacy.
FORBES: Another Federal Agency Jumps On The Online Privacy Regulatory Roulette Wheel