31.   But for now the application of choice is building extremely sharp filters that let cellular radio base stations operate without interference from unwanted signals or noise.

32.   But Frank D. Duval, president of Sterling Mining in Spokane, Wash., said experts had determined that the mine could operate without environmental harm.

33.   But Hong Kong has always operated without government interference.

34.   But hundreds, possibly thousands, more operate without permits, many of them competing head-to-head with city buses.

35.   But hundreds of Koran courses are believed to be operating without government approval, and with the new crackdown many are dropping out of sight.

36.   But if the ACLU wins its summary judgment motion before the bill passes, tattoo parlors could legally operate without state supervision, State Rep. David Tuttle said.

37.   But operating without knowing the source of bleeding could cause fatal complications if bleeding occurred during or soon after surgery.

38.   But recent studies have cast doubt on the wisdom of letting office labs operate without scrutiny.

39.   But Nauru permits its shell banks to operate without such encumbrances.

40.   But today, as manager of the Angels, Lachemann is operating without the luxury of a hands-down, lights-out relief pitcher.