The roof of the service wing is a segment of a cone with a larger radius at the top and a smaller radius at the bottom.
服务附楼的屋顶是一个圆锥的一部分，顶部半径大，底部半径小。
2
RADIUS provides a secure and efficient serviceof authentication.
RADIUS提供了一种安全有效的认证服务。
3
This model could be used to search the best serviceradius and compare the costs of different kinds of municipal domestic waste collection and transportation system.