Please keep your seat in the upright position until the plane reaches cruising altitude.

在飛機抵達巡航高度前，請將您的座椅保持在豎直的位置。

Store the boxes upright so the glass bottles inside do not break during shipping.

請將箱子直立擺放，以免運送途中裡面的玻璃瓶破裂。

Sitting upright during the interview made the candidate look confident and alert.

面試時坐得挺直，讓這位應徵者看起來自信又有精神。