Mary's sweater and millie's sweater are the same.

问题描述:

Mary's sweater and millie's sweater are the same.
还是用Mary's sweater and millie's sweater are same.
就是有没有the

应该是用Mary's sweater and millie's sweater are the same.
此时same是代词
pron.同样的事物或人(通常与the连用)