The design scheme of door security system based on ARM9 was presented.

提出了一种基于ARM9处理器的快速人脸检测门禁系统设计方案；

youdao

The hotel is equipped with front door security is one thing, but the side door, including door staff, but often no one on patrol.

在酒店前门配备安保人员是一回事，但是边门，包括员工门，可是常常没有人巡逻的。

youdao

For reasons of security the door is always kept locked.

为了保证安全，门总是锁着的。

《牛津词典》

Security forces have also launched a door-to-door search for members of the group.

VOA: standard.2009.07.30

He says the current U.S.strategy of pushing for a two-state solution is not winning support from Israelis who want to see a partition but are worried about Israel's security with Palestinians running their own state next door.

VOA: standard.2009.10.31

This "looking through" I interpret as similar to the way the door security guy at a posh night club "looks through" you as you attempt to persuade him your are on the guest list.

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The red metal security door that is used to close up the stall in the evenings is pockmarked with dozens of bullet holes.

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Aid workers are hoping the U.N. will have an easier time getting the governments of the Central African Republic and Chad to open the door for better security.

NPR: U.N. Weighs Force to Protect Darfur Aid Efforts