一个大型挡风玻璃雨刷厂的经理，需要估计一下在一般驾驶条件下雨刷平均使用寿命的期望值有多大。
A large manufacturer of windshield wiper blades needs to estimate the mean life users of the blades can expect under typical driving conditions.
引擎和动力传动系统、刹车系统、底盘、外型、内部以及诸如灯、挡风玻璃雨刷和紧急刹车装置都是关键的组件和子组件。
Engines and drivetrains, braking systems, chassis, exterior, interior, and safety features like lights, windshield wipers, and emergency brakes were key components and subcomponents.
需考虑三种外部系统：雨刷器接口，挡风玻璃，和汽车电子系统。
Three external systems are considered: the wiper interface, the windshield, and the car electrical system.
汽车挡风玻璃上雨刷的速度是可变的。
当后挡风玻璃被遮挡，那么你行驶在路上或者倒车时将失去后方部分视野，大大降低行车安全性，因此后雨刷一样重要。
When the rear windshield is blocked, then you will lose the driving rear part of the field of vision on the road or reversing, greatly reduce the traffic safety, so the rear wiper is as important as.
用一双旧袜子套在汽车雨刷上，可以防止雨刷晚上冻在挡风玻璃上。
Use an old pair of socks on your windshield wipers to prevent them from freezing and sticking to your windshield overnight.
河水在他身边打着旋，罗杰斯的手抓住一根雨刷，身体紧紧地贴在挡风玻璃上。
Rogers pressed himself against the windshield and clutched a wiper as the water swirled around him.
挡风玻璃上的雨刷单调地来回摆动，发出飕飕声。
挡风玻璃上的雨刷单调地来回摆动，发出飕飕声。
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