MIT sketching
A Shrewd Sketch Interpretation and Simulation Tool
Design rationale is often not recorded in mechanical engineering designs because it is not convenient to stop the design process to record every design decision that is made. Designing directly on the computer could assist the process of design rationale capture. At the very least a computer design tool could record all the changes made to a design over its lifetime.
有了這設計，各位物理老師日後可以更方便教學！
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