请帮我把这几句话翻成英文，谢谢

Question

1. 了解了扭转实验机的构造原理，并学习了操作。
2．学习了如何测定低碳钢的剪切屈服极限、剪切强度极限和铸铁的剪切强度极限。
3．观察到了低碳钢和铸铁在扭转过程中的变形和破坏情况。
在实际工程机械中，有很多传动是在扭转情况下工作。

这次试验做完后，我对铸铁和低碳钢的性质有了较全面的认识（拉伸、压缩、扭转、弯曲等）。铸铁表现脆性，低碳

钢表现韧性，低碳钢的可塑性比铸铁好，因为强度极限比较大，可用于制造铆钉等；铸铁可塑性比较差，易断裂。

需要保持平衡，这是为了避免引起初始扭矩。

请不要用翻译工具，谢谢

Answer 1

1. understand the aufbau principle of Torsional experiment machine, and learn to process.
2. learn how to test shear yield limit, shear ultimate tensile strength of mild steel and shear ultimate tensile strength of cast iron.
3. observe the deformation and destruction of mild steel and cast iron during torsion processing.l
in the actual engineering machinery, numbers of transmission are under torsion processing, after this experiment, i have got a comprehensive knowledge about properties of cast iron and mild steel (tension, compression, torsion, bend). cast iron show brittleness and mild steel show toughness. the plasticity of mild steel is better than cast iron because its ultimate tensile strength is larger, and it can be used to made rivet. cast iron is short of plasticity and easily broke, so it need to be keep balance to avoid initial torque.

Answer 2

20分 干大学生的活 太累

Answer 3

额 翻译工具也挺好用的的说……

Answer 4

其实我也刚开始学习英语 希望有人能帮你