in reserve
US /ɪn rɪˈzɜrv/
UK /ɪn rɪˈzɜːv/
短语
储备, 备用
kept for future use; held back or set aside
示例:
•
We have some extra supplies in reserve in case of an emergency.
我们有一些额外的物资储备以备不时之需。
•
She always keeps a little money in reserve.
她总是留一些钱备用。