slide：

v.(使)滑行，滑动;(使)快捷而悄声地移动;逐渐降低;贬值

n.降低;跌落;衰落;(在冰上或光滑表面上)滑行，滑动;滑梯

例句：

The windows slide down at the touch of a button.

按一下开关，窗玻璃便落下来。

His lecture was illustrated with slides taken during the expedition.

他在讲演中使用了探险时拍摄到的幻灯片。

The industry has slid into decline.

这个行业已成衰退之势。

She was sliding into depression.

她逐渐消沉下去。