This technique is referred to as an accordion menu because of the way panels slide up and down like an accordion when their respective title bars are selected.

该技术称为折页菜单（accordion menu），因为选择相应的标题栏时面板就像折页一样展开和收缩。

youdao

There are interior walls made of stainless-steel vertical panels that slide to open or close off rooms or create smaller openings.

WSJ: Sailing the Wide Miami Sky

You could add a pair of slide-out panels mounted behind the main display.

ENGADGET

Each sunrise he would alight on our greenhouse roof and slide down the glass panels, pecking furiously at his scarlet reflection.

NEWSWEEK: Culture