speed threshold

例句：

1. 1.The car's speed threshold is set at 60 miles per hour.
   汽车的速度阈值被设定为每小时60英里。
2. 2. The new safety regulations have increased the speed threshold for driving.
   新的安全规定提高了驾驶的速度阈值。
3. 3. The team needs to maintain a speed threshold to avoid overexertion.
   团队需要保持一个速度阈值以避免过度劳累。