When you enter the system, you can choose from a number of fanciful avatars.

当你进入系统，你可以从一大堆虚幻的神的化身中进行选择。

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Documents enter the system via a document service interface and are placed in queues.

文档通过文档服务接口进入系统并放在队列中。

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Write operations are idempotent and commutative, based on the time they enter the system.

基于进入系统的时间，写操作具有幂等性(不管操作多少次结果都不变的性质，比如取绝对值的函数就具有幂等性)和交换性(操作顺序不影响结果，比如加法就具有交换性)。

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In the subways, police have been posted to check bags as passengers enter the system, Mr. Kelly said.

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Take care not to follow the crowd through the metro exit gates or you will have to buy another ticket to re-enter the system.

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The Ministry of Justice denied that the ECL scheme had overburdened the probation service, saying most of those released did not enter the system.

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