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Both the smoke and velocity measurements were taken on a turbine during operation and when off-line , to represent startup as well as operational conditions . When ordinary speakers consider the generalizations , in seems-true contexts , and think about cases in which the antecedents are satisfied , the cases that first come to their minds are ones in which the agent does , as a matter of fact , believe and desire the relevant propositions in matching ways . All of these plants look absolutely beautiful when backlit by the clear winter sun . Capacitance : That property of a system of conductors and dielectrics that permits the storage of electricity when potential difference exists between the conductors . It is hard for the ordinary person not to lose a little sleep or to avoid feeling vulnerable when he-in company with the banks , of course-owns two homes . They look beautiful when backlit by the clear winter sun .