These modules have dependencies, some of which might not be present on your system.

这些模块有一些依赖项，有些可能系统上没有。

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It happily coexists with other installations of Eclipse that may be present on your test machine.

它同其它可能出现在您的测试机上的Eclipse的安装程序能够愉快的共存。

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To collect data from other machines used in distributed applications, the data collection infrastructure must also be present on all of those remote hosts.

为了从分布式应用程序的其它机器上收集数据，其它远程机器上也必须有数据收集底层架构。

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Pro-government Basij militia members are also reported to be present in large numbers on campuses across the country.

VOA: standard.2009.12.07

So can be changed slightly, depending on tense, past, present or future as well as whether or not you want to ask a question.

因此这个句型要根据不同的时态，如过去时、现在时和将来时，作出一点调整；另外也会根据是否是问句而略有不同。

There is 课堂 - SpeakingMax英语口语达人

because that sarcastic undertone may or may not be present depending on how it's used.

因为话中是否有挖苦的意思，还得看这句型是如何使用的。

Do you ever课堂 - SpeakingMax英语口语达人

This process will remove the risk of other unknown or undetected malware that may be present on your machine.

FORBES: IBM Distributes Malware-Infected USB Sticks At Security Conference

Instead, they are describing a way for an attacker to more easily exploit security vulnerabilities that must already be present on the system.

FORBES: How Bad Assumptions Are Making Software Less Secure

Members said enforcement agencies do not rely on pack design to test whether packs are illegal - instead they use a number of security features, all of which could also be present on standardised packs.

BBC: Cigarette pack plan 'won't increase smuggling'