Since coming to office in 2008 Mr Johnson has tried to make London a better city for two-wheeledtransport.
自从2008年上任以来，约翰逊就试图让伦敦成为一个更适宜两轮交通的城市。
2
For example, the use of wheeled vehicles to transport goods and the separation of materials by gravity-gradient processes can be modified to be used in lunar conditions.