31.   It is an elevated level of play, and I think people will be amazed at the ability and skill level of the players.

32.   Italian antiques at this elevated level seem to be coming back into fashion, though they are very expensive.

33.   Local officials are dumping extra chlorine in drinking water to battle elevated levels of bacteria caused by eroding pipes.

34.   Nitrates at elevated levels can cause harm to infants.

35.   Q. My carbon monoxide detectors are showing elevated levels.

36.   Recently, dozens of playgrounds were shut down in Florida after researchers found elevated arsenic levels in the soil.

37.   River otters no longer indicate elevated levels of the blood chemicals that indicate oil exposure, and so they too were declared recovered.

38.   Scientists have found that many breast cancer cells have elevated levels of an enzyme associated with cell growth.

39.   Some samples of the dust that cloaked the disaster scene, victims and rescuers on Tuesday showed slightly elevated levels of lead and asbestos, the agency said.

40.   Some of the current research deals with how different plants respond to elevated levels of carbon dioxide, which might someday be prevalent on Earth.