飞机上的时间——空间狭小，行动不便。

Time on planes - they're small and cramped.

对于行动不便的群体来说，替代性的输入设备是必需的。

Alternative input devices are necessary for Mobility-impaired individuals.

行动不便让他意志消沉，奥克特先生不再是孩子们记忆中那个外公了：他变得容易发怒，把孩子们吓坏了。

He was not the grandfather her children remembered: He was irritable; they were scared.