The plane had lost all hydraulic fluid, therefore losing all conventional flight controls.

这架飞机失去了所有的液压油， 因此失去了所有传统的飞行控制。

Steering hypersonically using conventional control surfaces, like wings and ailerons, is out of the question.

使用传统的控制面（例如机翼和副翼）进行高超音速操纵是不可能的。