时间有限，我只做了逻辑门，触发器没做。其它储如线性电路，非线性电路。由于我电子学得巨菜，且从小就深恶痛绝中。没办法做。还有，元件的移动，删除，新建，保存，都没时间做了-Time is limited, I only went for logic gates, flip-flop not to do. Other certificates such as linear circuits, nonlinear circuit. As I e-learning giant vegetables, an