o This second type of design situation is characterized by the fact that neither the need nor the problem to be solved has been identified 整句为被动语态。That.引导定语从句修饰 the fact,不定式 to be solved作后置定语,修饰 the problem⚫ This second type of design situation is characterized by the fact that neither the need nor the problem to be solved has been identified. ⚫ 整句为被动语态。That…引导定语从句修饰 the fact, 不定式to be solved作后置定语，修饰 the problem