Meaning of dé le:
得了
all right!; that's enough!
Nà chǎng bǐsài tāmen zhōngyú yíngle, wǒ xīnlǐ tāshi duō le, dé le!
那场比赛他们终于赢了,我心里踏实多了,得了!
They finally won the game, and I felt much relieved, all right!
Qǐng tíngzhǐ zhēnglùn, dé le.
请停止争论,得了。
Please stop arguing, that's enough!
(emphatically, in rhetorical questions) possible
Zhè wèi gēshǒu de shēngyīn zěnme kěnéng zhème chà? Zhēn shi nányǐ déliǎo.
这位歌手的声音怎么可能这么差?真是难以得了。
How can this singer's voice be so bad? It's really unbelievable.