1.the carbon-fiber aircraft reached a maximum speed of 68 knots (groundspeed), an average speed of 23 knots and a maximum altitude of 8, 564 metersabove sea level, a statement said.
有评论说,这架碳纤维的飞行器最高速度达到68节(水平速度),平均速度为23节,飞行高度最高为海拔8546米。
2.the carbon-fiber aircraft reached a maximum speed of 68 knots (groundspeed), an average speed of 23 knots and a maximum altitude of 8, 564 metersabove sea level, a statement said.
有评论说,这架碳纤维的飞行器最高速度达到68节(水平速度),平均速度为23节,飞行高度最高为海拔8546米。
3.the carbon-fiber aircraft reached a maximum speed of 68 knots (groundspeed).
碳纤维飞机达到了68节(地面速度)的最大速度。