1. There are many double-deckers in my city. 我市有很多双层车。
2. The traditional red double-deckers are a symbol of London. 传统的红色双层巴士是伦敦的象征。
3. Now London is famous for its excellent underground service and the red double-deckers have become a symbol of the city. 现在伦敦以它优良的地铁的服务而闻名，而且红色的双层巴士已经变成城市的一个象征。
4. The half-wave potentials of the first and second oxidations and first reduction for double-deckers of the tervalent rare earths are dependent on the size of the metal center. 还可以观察到第一和第二氧化过程的半波电位与中心金属的离子半径呈线性关系。
5. I've gone through all my savings to buy a new flat. LondonNow London is famous for its excellent underground service and the red double-deckers have become a symbol of the city. 现在，伦敦以其完善的地铁服务而闻名于世，红色双层巴士已成为城市的象征。
