Zhè / fèn / fēi / xíng / jì / lù / xiǎn / shì / fēi / jī / zài / sān / wàn / yīng / chǐ / de / gāo / dù / píng / wěn / fēi / xíng

这份飞行记录显示飞机在三万英尺的高度平稳飞行。

This flight record shows that the plane flew steadily at an altitude of thirty thousand feet.