Our speedover the ground was a miserable 2.2 knots.
我们在地面上的速度只有区区的2.2节。
《柯林斯英汉双解大词典》
2
By the biomechanical measurement, the authors analyze the footwork of 50 healthy old men and women over the age of 60. The footwork is conducted on the flat ground with normal speed.