制作另外一份数组副本，搅乱该副本，并构建一个联合数组，其中原来的字母将获得重组后的值。

Make a second copy of the array, shuffle the copy, and build an associative array, where the original letter gets a shuffled value.

youdao

制作另外一份数组副本，搅乱该副本，并构建一个联合数组，其中原来的字母将获得重组后的值。

Make a second copy of the array, shuffle the copy, and build an associative array, where the original letter gets a shuffled value.

youdao