1.San Francisco, Lombard Street, the twistiest street in the world ?
旧金山的伦巴第街-世界上最曲折的街道?。
2.San Francisco, Lombard Street, the twistiest street in the world ?
3.Is San Francisco, Lombard Street, the twistiest street in the world?
旧金山伦巴第街是世界上最曲折的街道吗？