存储
maintain
A：You have to maintain a balance of ($10,000/ $100/ $5,000) in the account. 你必须保证有（1万美元/100美元/5千美元）的余额存储。
B：I see. 我明白。
及物动词保持; 保养; 坚持; 固执己见
动词supportpossessprotectguardsavebearkeeppreserveretainsustainuphold
及物动词abandon
