求一篇关于发明的英语作文200词左右的,谢谢啦

时间机器
I will invent a time machine in the as it 's been my dream in my life.Time machine allows people to travel back in time to prevent disaster to happen.It also allows people to tavel into dinstant future to find out solution for Incurable illness including cancer and aids.However,this machine may be abused by people to create chaos in our world or even completely change our history.Therfore,security features are essential for my invention.The future invention of time machine will definately bring more advantages for human being.