摘要
开发自动变速箱可不是件容易的事一整套装置结构十分复杂，而且还必须保证耐用：变速箱的轴和套管的转速最高可达7000转／分、液压系统的压力为25个大气压、软件超过10万行代码。
Developing an automatic transmission is no small task. The finished assembly is complex but must be robust： its steel shafts and shrouds rotate at up to 7,000rpm;its hydraulic system operates under 25bar of pressure and its software contains more than 100,000 lines of source code.
