vertical

/ˈvərtɪkəl/

at right angles to the plane of the horizon or a base line

Chinese meaning: 垂直的；竖立的

The cliff face is almost vertical, making it difficult to climb.

悬崖面几乎是垂直的，很难攀登。

Please draw a vertical line down the center of the page.

请在页面中央画一条垂直线。