She had enough money but she didn't buy an auto but an autobike.
她有足够的钱但她不买汽车只买了机器脚踏车。
英语百科
Autobike
Autobike is an automatic shifting bicycle.
The original Autobike was equipped with centrifugal weights on the rear wheel and a Low-Normal rear derailleur that was attached to said weights, the rider would start pedaling causing the weights to spin outwards which in turn shifted the derailleur to a harder gear. Stop pedaling and come to a stop, the weights would return shifting the bike into an easier gear to get started.