If the seat pan could be adjustable, that would accommodate people of varied leg lengths.

如果座椅可以调节，那就可以容纳不同腿长的人。

If passengers could adjust the depth of their seat pan, it would help them support their knees and be able to sit fully against the seatback.

如果乘客可以调整座椅的深度，这将有助于他们支撑膝盖，并能够完全靠在椅背上。

If the seat pan is too deep or compresses the back of the knees or the legs, it's great to have some sort of support under the feet.

如果坐垫太深或压迫了膝盖或腿的后部，那么在脚下有一些支撑总是很好的。

And for the person who found the seat pan to be too deep, if they could bring the depth back, it could mitigate contact pressure or discomfort for them as well.

对于那些觉得坐垫太深的人来说，如果他们能把深度调回来，也可以减轻接触压力或不适。