absolute ceiling

基本解释

Nevertheless, it, spiritually, which has no ceiling to rise up to, is an absolute concept.
在精神来说，却可以有无限上升的空间，是个绝对的概念。
At this absolute assertion, the Jondrette woman raised her large, red, blonde face and stared at the ceiling with a horrible expression.
听见这斩钉截铁的话，容德雷特婆娘抬起一张又红又白的宽脸，用一种奇丑的神情，注视着天花板。

And we are heartened, as we have been in the past, by comments that have been made about the absolute necessity of raising the debt ceiling because we do not want another recession.
WHITEHOUSE: Press Briefing
What we have said all along is that it sends the wrong signal and it would be a mistake to directly link, tie, or hold hostage one to the other because of the absolute necessity of raising the debt ceiling.
WHITEHOUSE: Press Briefing
But I take, and the President takes some of the statements by Republican leaders and important and prominent Republicans about the absolute folly of pursuing a strategy that ties raising the debt ceiling to demands on spending cuts, the fact that it is folly -- we take heart in that because we believe it's good for the economy to cease that practice.
WHITEHOUSE: Press Briefing

the maximum height above sea level, usually measured in feet or metres, at which an aircraft can maintain horizontal flight &rarrcompareservice ceiling