例1:Nevertheless, such methods can be extremely useful when they are properly applied.
譯句:然而,這類方法只要應用得當便十分有用。
例2:The only way an individual can receive the benefits from a private good is by paying for it; there are no effects on others, and it is possible to separate payers from non-payers.
例如:While there are almost as many definitions of history as there are historians, modern practice most closely conforms to one that sees history as the attempt to recreate and explain the significant events of the past.