41.   I miss the car, but the bus system is good.

42.   If a neural network system is good at recall functions only, then it is necessary to impose constraints and limitations.

43.   If attaching strings to future generations without their consent is wrong, the Social Security system is indefensible.

44.   If the compromised system is on a backbone network, intruders can monitor any transit traffic traversing between nodes on that network.

45.   If there were a comprehensive, integrated mass transit system here, fewer people would drive their own cars.

46.   Illustrated is the system used for securing sheets to a simple lean-to verandah roof with timber frame.

47.   In a developed country that system is generally dependable.

48.   In a word, a steady state system is lively, even truly alive, like a Darwinian universe.

49.   In Great Britain, one major judicial system is responsible for criminal law and a second handles civil law.