Data categories are like abstract base classes; a category might be able to represent all models of car, for instance. 数据类别类似于抽象基类,比如,一个类别可以表示所有的汽车型号。
We noticed also that all OEMs are going to equip in-car navigation systems for their new car models, not only for premium car segment, but also for mass market car segments. 同时,在汽车制造厂商也为他们的新车型配备车载导航,这些车载导航不光装备在高端的车型上,而其装备在一些经济型车辆。
All the results show that biomass models established in this paper not only realize compatibility with volume table, but also get remarkable improvement in estimate effect and prediction precision comparing with previous model CAR. 研究结果表明,所建的生物量模型不仅实现了与材积表的兼容,而且估计效果和预估精度较以往的CAR模型都有显著提高。