acceleration grade

例句：

1. 1.The car's acceleration grade is rated at 0-60 mph in 5.9 seconds.
   这辆车的加速等级被评级为0-60英里每小时在5.9秒内。
2. 2. The new model has a higher acceleration grade than the previous one.
   这款新型号的加速等级比之前的型号要高。
3. 3. The driver must maintain a high acceleration grade to reach the destination in time.
   驾驶员必须保持高的加速等级才能及时到达目的地。