超值的英文：
overflow

参考例句：

Our shop provides our old customers with a premium card, with which they may get unconventional enjoyment.
本店为老顾客提供超值享受的优惠卡。

overflow是什么意思：
n. 溢值，超值，泛滥
v. （使）泛滥，（使）溢出，充溢

Stop the overflow from the cistern!
止住水，让它不要再从水箱溢出了！

My heart overflowed with tenderness.
我的心里充满了柔情。

Hospitals overflowed with the wounded.
医院里塞满了伤员。

The sink overflowed and the kitchen floor was awash.
洗涤槽的水溢出来了，厨房里满地都是水。

He sang before overflowing crowds.
她在挤满的群众面前。