The health authorities are investigating the problem.

卫生当局正在调查这个问题。

《牛津词典》

Police are investigating the disappearance of a young woman.

警方正在调查一位年轻女子的失踪案。

《牛津词典》

Police are investigating the suspected drug ring at the school.

警方正在调查这所学校贩毒嫌疑团伙。

《柯林斯英汉双解大词典》

In another case,federal officials are investigating the disappearances of more than twenty young Somali men.

VOA: special.2009.10.17

Now American officials are investigating the brake system on the twenty ten Prius.

VOA: special.2010.02.05

Police are investigating the thefts.

VOA: special.2010.01.19

Quenton Roehricht, a spokesman for the international military coalition, adding they are investigating the incident.

WSJ: Powerful Blast Hits Afghan Capital

Both Cup officials and the San Francisco Police Department said they are investigating the crash.

WSJ: Before America's Cup Capsize, Concerns About Safety

The San Mateo Fire Department and police are investigating the cause of the blaze.

BBC: Bride among five dead in US stretch limo fire