insatiable

/ɪnˈseɪʃəbəl, -ʃɪə-/
always wanting more of sth; not able to be satisfied 不知足的；无法满足的
an insatiable appetite/curiosity/thirst
永不满足的食欲／好奇心／渴望
There seems to be an insatiable demand for more powerful computers.
人们对计算机性能的要求似乎永无止境。