COMB in N-COUNT
(与 time，energy 等词连用)表示“省…的”，“节省…的”
-saver combines with words such as 'time' and 'energy' to indicate that something prevents the thing mentioned from being wasted.
例句
These potatoes are sold ready sorted and washed, and can prove a great time-saver for the busy cook...
这些土豆卖时已拣好洗净，对于赶时间做饭的人来说能节省很多时间。
These zip-top bags are great space-savers if storage is limited.
如果可储藏的地方有限，这些拉环式背包能节省很大空间。