主动安全是指尽量自如的操纵控制汽车的安全系统措施。无论是直线上的制动与加速还是左右打方向都应该尽量平稳，不至于偏离既定的行进路线，而且不影响司机的视野与舒适性。
基于任务的访问控制模型是一种以任务为中心，并采用动态授权的主动安全模型。
Task based Access Control Model is task centered and offers dynamic authorization , so it belongs to the active security model.
基于任务的授权控制（TBAC）则是以任务为中心，并采用动态授权的主动安全模型。
Task based access control (TBAC) is an initiative security model, where task is focus of work and dynamic authorization is used.
电子稳定程序(esp)控制系统是一种在各种行驶条件下能提高车辆行驶稳定性的主动安全体系。
The control system of the electronic stability program (ESP) is an active safety system which can improve the vehicle's driving stability under various driving conditions.
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