For a long time
It is pronounced R ì x ǔ Du ō sh í as an object and adverbial; it is used for time.
Idioms and allusions
[source] Song Shi Xiaoyou's "slow voice" CI: "the moon before the flowers, good scenery, good time, stay together for a long time."
Discrimination of words
I remember going to Shangdu from the Yi family for a long time, and working hard at night. Dong Jieyuan's Xixiangji zhugongdiao (Volume 8)
For a long time
a thousand things wait to be done - bǎi fèi dài xīng
the younger generation will surpass the older - hòu shēng kě wèi
folly of trying to see the sky with a basin over one 's head - dài pén wàng tiān