求翻译，急

求翻译，急

重量为P1的梁AB由质量可忽略不计的杆CD支撑。重量为P2的电机放置在梁AB上。绘制杆CD和梁AB的自由体图表。追问The homogeneous beam AB of wight P1 is supported by a bar CD of negligible mass, A electromotor of wight P2 is place on the beam AB. Draw the free bodydiagram of bar CD and beam AB漏了一点点，麻烦加上好吗？追答重量为P1的均质梁AB由质量可忽略不计的杆CD支撑。重量为P2的电机放置在梁AB上。绘制杆CD和梁AB的自由体图表。

什么鬼？😔追问专业书上的。。。看不懂The homogeneous beam AB of wight P1 is supported by a bar CD of negligible mass, A electromotor of wight P2 is place on the beam AB. Draw the free bodydiagram of bar CD and beam AB追答什么书？编程吗？还是……追问工程力学