upright
单词辨析：
指与平面、水平线成 90 度角的，也可指沿此方向上升或下降的。
What does the vertical axis of that graph represent?
那个图的纵轴代表什么？
They used to go to a gorge lined with vertical cliffs.
他们以前常去一个峭壁林立的峡谷。
What does 'vertical drop' mean in skiing?
滑雪中的“垂直落差”是什么意思？
强调笔直挺拔的，而不是倾斜、弯曲或倒塌的。
an erect pine
挺拔的松树
hold oneself erect
保持姿势挺直
A waiter stood erect beside their table.
一名服务生在他们餐桌旁笔直地站着。
指站或坐得笔直的，也指处于竖直方向的。
He sat upright behind the desk.
他挺直地坐在课桌后。
If you have to carry this bottle of paint with you, then you'd better keep it upright.
如果你非要带着这瓶颜料的话，你最让它保持直立。
相关例句：
Jerrold pulled himself upright on the bed
杰罗尔德从床上坐了起来。
Helen sat upright in her chair
海伦笔直地坐在椅子上。
When I pushed his door open, Trevor was sitting bolt upright in bed.
当我推开特雷弗的房门时，他正腰杆笔直地坐在床上。
My back is so crooked and painful that I cannot stand upright.
我的背又弯又痛，站不直。
Farrell drew himself upright and shook hands with us.
法雷尔站直了与我们握手。
Sit in a relaxed upright posture.
保持放松、直立的坐姿。