The portraits were split into a left and a right section, then one side was horizontally flipped to create two symmetrical identities of the subject.

照片被分为左右两边各一张，一边的的照片中让肖像水平的做成对称的样式。

youdao

Two Stage, Horizontally Split Case Pumps designed for applications requiring moderately high head over a wide range of flows.

双级水平中开泵为需要适度的高水头而设计，能提供一个很宽的流量范围。

youdao

You can also split the editor screen either horizontally or vertically to compare lines.

可以也拆分编辑器屏幕或者水平或垂直比较行。

youdao

The result was interesting, Unlike pork, the wild boar ribs had two distinct layers, sort of like pork belly, with a layer of meat and a layer of fat almost perfectly split horizontally.

FORBES: Wild Boar: The Other Other White Meat?

One option would be to split Microsoft horizontally into three parts.

BBC: Software giant 'faces split'