背景：安全驾驶中常需紧急制动，一般用总刹车反应时间、反应时间和刹车时间来反映驾驶员紧急制动的能力。
BACKGROUND: The ability to perform an emergency stop is essential for safe driving and can be represented by total brake-response time, reaction time, and braking time.
背景：安全驾驶中常需紧急制动，一般用总刹车反应时间、反应时间和刹车时间来反映驾驶员紧急制动的能力。
BACKGROUND: The ability to perform an emergency stop is essential for safe driving and can be represented by total brake-response time, reaction time, and braking time.
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