将下面对话翻译成中文,写在本子上,拍照上传。对话读一遍,上传 • (David and Sam are discussing ATO system in metro operation. ) David :What does ATO stand for ? Sam : It means Automatic Train Operation. David : What is its main function? Sam : Mainly it ensures the normal running and optimizing of train dispatch in stead of • TO’s automatic operation , including accelerate smoothly , speed controller and • station stopping . David : What is the greatest advantage compared with ATO operation? Sam : It can reduce manful fault . David : Is ATO applied in China? Sam : It is widespread in Hong Kong area, and it isn’t used in mainland. A full-time TO is sent for every train, whose main job is to control the door’s opening and closing.