A great scientist would be one who invents things for the welfare of the world,the environment,and the people.He will not be one who only heads for fame or money.He will look deep into what the world needs and will make sure that everything he makes will not harm the nature,neither will it depletes the natural resources on the Earth.He will assure sustainable development in whatever way he can ......我要一百个单词的，你可以帮我嘛？