If you describe something as indecent, you mean that it is shocking and offensive, usually because it relates to sex or nakedness.
obscene
He accused Mrs Moore of making an indecent suggestion.
他指控穆尔太太做下流的性暗示。
If you describe the speed or amount of something as indecent, you are indicating, often in a humorous way, that it is much quicker or larger than is usual or desirable.
She finished her first glass of wine with indecent haste.
她忙不迭地把第一杯酒干了。