31.   Any such signal would be readily distinguishable from effects of gravity waves, he said.

32.   As a result, the signals are simply too close together for current trains, which need more stopping room.

33.   As for the clothes, there may be some signals of things to come to the mainstream.

34.   As for watching television stations, some systems offer a tuner, although the signal is not very good in a moving vehicle.

35.   As usual, the economic signals are conflicting.

36.   Because the signals are more compact, the cable companies can often transmit more data through their wires, resulting in more channel options for the customer.

37.   Because digital signals are nearly impervious to interference, cable operators say digital transmission will compensate for the lost resolution.

38.   Because returning signals are so weak, detectors must be extremely sensitive, even if relatively small.

39.   Beyond the usual antiglobalization protests, there were disquieting signals that not all is well with the free trade, free market agenda.

40.   A digital TV signal is like a pipeline.