is kept是什么时态

　　例句：

　　The scheduling node and the execution node use a protocol that ensures that the state information is kept on disk by at least one of them.

　　调度节点和执行节点通过一个协议来确保至少它们其中一个要在磁盘上保持那些状态信息。

　　Review and ensure the Company databases for the responsible commodity is kept fully up to date and reportable when required.

　　审核并确保公司数据库中本人负责的物品信息完整并为最新数据，随时可供汇报。

　　Provided the system as a whole is kept functioning, weak institutions must be allowed to fail, as part of the ongoing adjustment.

　　只要系统作为一个整体仍保持运行，就必须让虚弱的机构自行淘汰出局，作为持续调整的一部分。

　　The paper-shop window is a litter of odds and bobs; if the light is kept on at nights the children make it a meeting-place.

　　纸店的橱窗里一片杂乱；如果晚上不关灯，孩子们就把它当作集会的场所。

　　Such a comparison partly reflects the fact that much of China's vast domestic savings is kept in the bank.

　　这种对比结果，一定程度上反映了这样的事实：即中国规模庞大的国内储蓄，大部分都被放在了银行里。