Wheelchair athletes move at speeds of up to 20 mph , and simply pulling a t-shirt down over an athlete 's knees can shave tenths of a second off performance .
坐轮椅的运动员移动速度高达20英里/小时,仅拉下运动员的一件t恤到膝盖,足以影响1/10秒的表现。
Jacques is disappointed with his time , 1 minute 17 seconds , but is buoyed when he learns our maximum speed was 123 kmh ( 76 mph ) .
But the students also reckon that the bat-suit cannot generate enough lift and that he would crash-land at a speed of 80 kph ( 50 mph ) .
但学生还认为蝙蝠装不能产生足够的升力,并且他会以80公里/小时(50英里/小时)的速度着陆。
It only measures a quarter or a mile long between these points and the speed limit is only five mph and you can only drive one way in the downward direction .
它到这些点之间的距离只有1/4或1英里长,车速限制只有5英里/小时,而且你只能向下一个方向行驶。
Airborne , you can expect speeds of 100 kts ( 115 mph ) , and road fuel consumption is a not unreasonable 30 mpg .