她是个节俭的人，每个月都会存一部分工资。

She is a careful ___saver, setting aside part of her salary every month.

这台洗碗机真是个省时省力的好帮手。

This dishwasher is a real ___saver for household chores.

这个节水装置能帮我们每月减少30%的水费开支。

This water-___saver helps us cut monthly water bills by 30%.