n.失望；松懈；飞机的程序下降

Not getting an invitation to the party is a big letdown for Jill. 没有接到参加晚会的邀请，吉尔感到十分失望。

To some, the apparent limitations of quantum computers might come as a letdown. 或许会有些人认为，量子电脑明显的局限真是令人失望。

Although no team is letdown proof, KG will require that his teammates sweat the details. 尽管没有球队有显得松懈的证据，但是加内特则一直要求自己的队友在球场上挥洒汗水来扫出后顾之忧。