He mentally calculated the train's decelerationrate and groaned.
他心里计算着火车的减速速度，痛苦地哼了—声。
2
He mentally calculated the train's decelerationrate and groaned. We'll never stop in time.
他心里计算着火车的减速速度，痛苦地哼了—声。我们绝对不可能及时停车的。
3
The deceleration in prices of rents and other services already is in place, thanks to slack in the housing market and the nation's 9.7% unemployment rate.