求翻译一道狒狒数学里的题目

跳着舞想你

For all x, x is positive integer,  "2-height" is defined

    to be the greatest nonnegative n of x, what is the

    greatest number of 2-height when 2" is the factor of x?

请各位大虾帮帮小女子，帮忙翻译一下什么意思