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。
2
He glanced at the screen, typed “vitesse au sol” into The French king, and held it up for me to see the Chinese: “Groundspeed.”
他扫了一眼，将“vitesse au sol”输入了法语王，然后将它递给我看中文：“地速。”
3
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.