The height of the left vertical line is the height of LiteStats chat and automatically adjusts to the height of the chat if it was changed.

左侧边框垂直线的高度就是聊天框的高度，并能随聊天框高度的变化而自动调整。

youdao

Near the middle left is a vertical ToolBar with the Open Tracker button at the top.

靠近左侧中间是一个垂直的 ToolBar，它的顶部有一个 Open Tracker 按钮。

youdao

Containing block vertical constraint. A left float box's top margin edge may not be higher than the containing block's top padding edge.

包含块的垂直限制：左浮动框的上margin edge不能高于包含块的上padding edge。

youdao

What the Japanese screenmakers have done is merely split a screen image into two or more vertical slits, with some views going to the left eye and some to the right.

FORBES: Adventures in the Third Dimension

The gear selector comprises a vertical row of P-R-N-D-S touch-screen buttons on the left of the central LCD touch screen (shades of the '64 Plymouth Valiant).

WSJ: 2013 Lexus RX 350 F Sport Review: Dashed on the Rocks of the Lexus Dash | Rumble Seat by Dan Neil