Don't be left standing, ladies and gents, while a bargain slips past your eyes.

别光站着，女士们先生们，价廉的商品就要从你们眼皮底下溜走喽。

My belt buckle slips inside the windowsill.

我的皮带扣滑到窗沿里面了。

My heel slips out of my running shoe with every pair I buy.

我的脚后跟总是从我买的每一双跑鞋里滑出来。

We must be well prepared, there must be no slips.

我们必须好好准备，一定不要有差错。

The action slips from comedy to melodrama and finally to tragedy.

剧情由喜剧慢慢发展成闹剧，最后又演变为悲剧。