Drift-off moment is the moment in a sales presentation when the potential buyer imagines how much better their life will be if they purchase the product or service. 

“漂移时刻”指的是在销售展示活动中，潜在买家设想购买了这种产品或服务，生活会变成什么样的时刻。

Sales people use this expression to refer not to a potential buyer’s eyes glazing over in boredom but to the moment when the buyer drifts off into imagining how Product X will make life somehow better. 

销售人员使用“漂移时刻”不是指潜在买家目光呆滞，而是说买家目光游离，开始设想这种产品会如何使生活变好。