文章讨论了无线安全系统的潜在弱点，特别是关于信号阻塞或干扰的问题。提到尽管某些系统可以消除大部分断线担忧，但无线干扰（jamming）仍然是一个不容忽视的安全隐患。干扰设备能够阻挡报警信号到达基站，这种担忧不仅存在于安全系统中，而且在多个领域都有所体现。文章还回顾了历史上的安全顾虑，比如家庭安全系统可能被完全阻止运行的理论问题，以及在不同情境下如何处理干扰或阻碍的情况。
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That approach will eliminate most cord-cutting concerns—but what about their wireless equivalent, jamming? With the right device tuned to the right frequency, what's to stop a thief from jamming your setup and blocking that alert signal from ever reaching the base station?Jamming concerns are nothing new, and they're not unique to security systems.
出自-2016年12月阅读原文
One of the main theoretical home-security concerns is whether or not a given system is vulnerable to being blocked from working altogether.
出自-2016年12月阅读原文
For me it took the form of my first, and I hope only, encounter with writer's block—I was not able to produce anything for three years.
出自-2015年12月阅读原文
Clock-timers organize their day by blocks of minutes and hours.
出自-2015年12月阅读原文
But inside, special windows cut power bills by blocking solar heat in summer and retaining indoor warmth in winter.
出自-2013年6月阅读原文
The boot time is pretty fast, and he navigates through (浏览 ) a few chapters before swiping into a fully rendered 3D molecule that can be spun around to view its various building blocks.
出自-2013年6月阅读原文
The next block was almost empty.
出自-2012年6月听力原文
it had keen moved to the next block
出自-2012年6月听力原文
For me it took the form of my first, and I hope only, encounter with writer's block— I was not able to produce anything for three years.
2015年12月四级真题(第二套)阅读 Section B
Japan says fear of disease is its main reason to block fresh imports.
2018年12月四级真题(第一套)听力 Section A
The incident happened on the 400 block of Rutland Road just after 12:30pm.
2018年12月四级真题(第二套)听力 Section A
The city is the building block of civilisation and of almost everything people do; a guidebook to the city is really, therefore, a guidebook to how a large and ever-growing chunk of humanity chooses to live.
出自-2013年6月阅读原文
Hello, my bathroom drain is blocked and I'm giving a party tonight.
出自-2012年6月听力原文
An application of the method of moving blocks to the pyramid site.
2015年高考英语四川卷 阅读理解 阅读E 选项
An argument about different methods of moving blocks to the pyramid site.
2015年高考英语四川卷 阅读理解 阅读E 选项
An experiment on ways of moving blocks to the pyramid site.
2015年高考英语四川卷 阅读理解 阅读E 选项
An introduction to a possible new way of moving blocks to the pyramid site.
2015年高考英语四川卷 阅读理解 阅读E 选项
Another block to awareness is the obsession many of us have with naming things.
2018年高考英语天津卷 阅读理解 阅读D 原文
At one point, huge piles of snow blocked his way.
2016年高考英语北京卷 完形填空 原文
Block, I need to take a few days off because my father is coming over to visit.
2017年高考英语全国卷2 听力 原文
Failure blocked his way to success.
2015年高考英语天津卷 阅读理解 阅读D 选项
Go straight ahead and walk about three blocks.
2017年高考英语全国卷1 听力 原文
He and his students tied some poles to each of four sides of a 30-kilogram stone block.
2015年高考英语四川卷 阅读理解 阅读E 原文
In the southern United States, pieces of corn bread represent blocks of gold for prosperity in the new year.
2015年高考英语安徽卷 阅读理解 阅读E 原文
Instead of walking a few blocks to pick up a child or the dry cleaning, they send the self-driving minibus.
2018年高考英语北京卷 阅读理解 阅读D 原文
It's widely believed that the stone blocks were moved to the pyramid site by sliding them on smooth paths.
2015年高考英语四川卷 阅读理解 阅读E 题设
Living just a few blocks from the beach, Natalie can see the ocean and hear the wave from her house.
2016年高考英语北京卷 阅读理解 阅读B 原文
Yes, but a few blocks down town would be much more expensive.
2018年高考英语全国卷I 听力 原文
Many scientists suspect workers first would have put the blocks on sleds.
2015年高考英语四川卷 阅读理解 阅读E 原文
That action turned the block into somewhat a wheel.
2015年高考英语四川卷 阅读理解 阅读E 原文
That, he notes, should make a block of stone "a lot easier to roll than a square".
2015年高考英语四川卷 阅读理解 阅读E 原文
The building has a remarkable shape and looks like a combination of "blocks".
2015年高考英语湖北卷 阅读理解 阅读C 原文
The Egyptians somehow moved the stone blocks to the pyramid site from about one kilometer away.
2015年高考英语四川卷 阅读理解 阅读E 原文
The most popular view is that egyptian workers slid the blocks along smooth paths.
2015年高考英语四川卷 阅读理解 阅读E 原文
The pressures of "time" and "destination" are further blocks to awareness.
2018年高考英语天津卷 阅读理解 阅读D 原文
The researchers found they could easily roll the block along different kinds of paths.
2015年高考英语四川卷 阅读理解 阅读E 原文
Then they placed the block on the ground.
2015年高考英语四川卷 阅读理解 阅读E 原文
They calculated that rolling the block required about as much force as moving it along a slippery path.
2015年高考英语四川卷 阅读理解 阅读E 原文
They wrapped one end of a rope around the block and pulled.
2015年高考英语四川卷 阅读理解 阅读E 原文
West hasn't tested his idea on larger blocks, but he thinks rolling has clear advantages over sliding.
2015年高考英语四川卷 阅读理解 阅读E 原文
Despite variations in detail, wholesale markets in the countries that have been closely examined— France, Germany, Italy and Spain—are made out of the same building blocks.
出自-2010年考研阅读原文
It remains the world's largest trading block.
2011年考研真题(英语二)阅读理解 Section Ⅱ
Some Congress members are trying to block the plan, and at least a dozen industry groups, four states, and three environmental groups are challenging it in federal court.
2016年考研真题(英语二)阅读理解 Section Ⅱ
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