摘要
Chokwe Selassie,13,stood next to a pothole(坑洼)in the street in his hometown of Jackson,Mississippi.The eighth grader was working with his friends to create an app that warns drivers about potholes.Chokwe Selassie was on a task to help drivers avoid potholes.The eighth-grader came up with the idea on a morning,when his
Chokwe Selassie,13,stood next to a pothole（坑洼）in the street in his hometown of Jackson,Mississippi.The eighth grader was working with his friends to create an app that warns drivers about potholes.Chokwe Selassie was on a task to help drivers avoid potholes.The eighth-grader came up with the idea on a morning,
