“你不需要吃完”翻译成英语？

You don't need to eat it up.
food不可数,用it好

You needn't eat them all up

祝楼主在新年里万事如意

You don't have to finish it.

You don`t have to eat it up.

you donnot eat them up

You don’t have to eat them up。 这个比较地道