Content selection and instructional method design are the two major constraints to the effectiveness of the strategy.
策略内容选择和教学方法设计乃策略教学有效性的两大制约因素。
Traditional design models lack the effective instructional strategy for ill-structured domains instruction, and the students'ability to revolve ill-structured problems is stagnant.
传统教学设计在劣构领域表现出力不从心，学习者劣构问题解决能力停滞不前。
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