Intruders might invade your systems for one of two reasons: to gain access to information that they should not have or to alter the behavior of a system.

入侵者入侵您的系统可能是出于这两个原因之一：为了获取他们本不应该拥有的信息，或者为了改变系统的行为。

youdao

For logistical and political reasons, scientists have only recently been able to gain access to the area.

因后勤与政治原因，科学家们直到最近才得以进入该地区。

《柯林斯英汉双解大词典》

Thus I have been allowed to gain access to their living environment.

因此我被允许进入他们的生活环境。

youdao

"Because it's easy and cheap and every farmer can basically get their own phone or borrow someone's down the road, I think it's increasingly a way for them to gain access to things they didn't have before."

VOA: standard.2010.07.28

Web applications are often slow, because most consumers have to gain access to them over dial-up connections.

ECONOMIST: Software

However, I have managed to gain access to the secret site and it seems clear that the government has seriously underestimated the challenge of getting claimants to start paying their monthly rent.

BBC: Welfare reform and not paying the rent

Security News Daily reports that phishing scams have allowed hackers to gain access to frequent flier accounts.

BBC: In brief: Nepal to re-measure world's highest mountain