Our room was on the second floor but you could still hear the roar of the ocean and see the stars at night. I used to take long walks along the water. The food in town was wonderful and the people were very friendly. The area was very quiet and peaceful, and fairly deserted.

    The last evening of our vacation, however, we all heard strange footsteps following closely behind us as we were walking up to our room in the holiday centre. We turned around and noticed a fairly young man moving very rapidly across the beach and getting closer to us. He was tall and wore a baseball cap. We didn't have any cell phones on us. I never saw Dad as worried as he was then and knew that something was terribly wrong. The sense of fear started to overwhelm Mom and me. We had had such a good time in town. Now, the night was rapidly turning into a dangerous situation.

    We could hear the man's footsteps getting closer. Dad's face was almost pale. The so-called intruder (侵入者) had moved nearer and nearer when all of a sudden, the nearby vending (自动贩卖) machine started going crazy and spitting out cans of soda! The noise actually scared the intruder and he ran out of sight. My parents were shaking, but we all turned around to see who had put money into the vending machine downstairs, and actually saved us, but no one was around at all.Not a soul.

    It's one vacation I will never forget.

    What do you use to unlock your cellphone? A password? A fingerprint? Or simply a glance?

    On September 12, 2017, Apple introduced its iPhone X, which has an eye-catching feature—Face ID.

    With Face ID, Apple says, you can unlock your new iPhone by just looking at it. It is powered by a so-called TrueDepth camera system built into the front of the iPhone X.

    When the camera system sees a person's face, it uses 30,000 unseen dots to “map” the shape and outline of the face. A mathematical model of the face will then be created and stored in the phone.

    The next time the person looks at the iPhone X, the same dots are mapped onto his or her face and compared to the stored model. If the two match, then the phone unlocks. This happens in less than a second.

    Apple says the system is smart. If you change your hairstyle, put on sunglasses or makeup, or use the phone in the dark, Face ID still works.

    Although the technology sounds fancy, there are still concerns. For example, will Face ID work for twins?

    According to Apple, the chance of others to unlock your iPhone X using Face ID is one in a million. Face ID can tell the difference between twins, but the error rating（出错率）rises. So one would need to set a password then.

    Apple also emphasizes that Face ID only unlocks when you stare at it. It is what Apple calls “attention aware”. So the phone won't unlock if you are just glancing at the phone for the time. It won't work either if someone puts the phone at your sleeping face or your photo.

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    Native English speaker

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    Resume(简历)

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    Few of us make money by losing sleep. But three graduate students at Brown University in Providence built a company around sleep deprivation(睡眠不足).

    Jason Donahue, Ben Rubin and Eric Shashoua were working late nights in Brown's business and engineering schools. They began thinking about ways to sleep better. They discovered they weren't alone in burning the midnight oil. Around 20% of Americans get less than six hours of rest a night.

    The friends imagined a smart alarm clock that could track how much time people spend in the most restorative(有恢复作用的) stages of the sleep cycle: REM (rapid eye movement) and deep sleep. What would it cost to design such a thing? Five years of research, 20 employees, $14 million and a whole lot of doubting from investors and scientists.

    Their company, Zeo, based in Newton, Mass, launched its product in June, 2009. The Zeo device uses a headband with tiny sensors(传感器) that scan your brain for signs of four sleep states-REM, light, deep and waking sleep. The smart alarm clock displays a graph of your sleep pattern and wakes you as you're not in REM sleep. In the morning you can upload the data to the company's Web site, and so track your sleep over time. Most of the feedback(反馈) comes in the form of Zeo's ZQ score showing how well you've slept.

    “Zeo allows people to unlock this black box of sleep,” says Dave Dickinson, a health-care CEO.

    Whether any of this actually improves sleep is up to the consumer, who will also need to make lifestyle changes like cutting out alcohol before bedtime or caffeine after 3 P.M.

    For now the company is selling Zeo online only. Dickinson also plans to spread it to countries such as Australia, where sleep deprivation approaches US levels.

    A nation's humor is linked to the historical development of the country. How funny somebody finds a certain thing depends on many things including ages, personal experiences, levels of education and locations. Therefore, humor is something that is not always transferable (可转移的) in another country.

    What about when both countries speak the same mother tongue? Does that mean they will then share the same sense of humor, or can differences still take place? Let's take the example of Britain and America. Time and time again, people say that Brits and Americans don't "get" each other's sense of humor. It is often argued that one of the most common differences between the British and American sense of humor is that Americans don't understand irony (反话). Simon Pegg explores this topic in depth in his article What Are You Laughing At? He concludes that this statement isn't true and I agree with him.

    In fact, Brits use irony on a daily basis while Americans don't. I think Americans understand British irony (most of the time anyway); what they don't understand is the need to use it so frequently. When Americans use irony, they tend to say that they are "only kidding". They feel the need to make a joke more obvious than Brits do. Maybe this comes from a fear of offending (冒犯) people.

    The American sense of humor is generally more slapstick (闹剧的) than that in Britain. I think this arises from a cultural difference between the two. Their jokes are more obvious and forward, a bit like Americans themselves. British jokes, on the other hand, tend to be more subtle. This may stem from the fact that British culture is more reserved (矜持的) than American culture.

We all love to take photographs. It's a simple way to snap a special moment, an amazing view, or just to show off your artistic skills. And it's great to look back through your photo albums and share memories with your friends. In fact, they show a snapshot (快照)in time. This hasn't really changed since the invention of photography in the 1830s. But one thing that has changed is the equipment we use.

For many years, we have used traditional cameras to take our pictures with. Our images were taken onto camera film which was then processed into negatives from which photos were printed— a lengthy process. And we've had a range of cameras to choose from— from the simple compact camera to more advanced single lens reflex, or SLR cameras.

But the biggest change has come with the development of digital devices. This has made taking photo quicker and easier. It's enabled us to take a snap and review our pictures instantly. We've been able to deal with them in post-production, using software on our computer. And of course, we've been able to share them like never before— particularly on social media.

Of course, now we have the smartphone— a phone that is, well, smart because it can take photos and sometimes very good quality ones, and we can share them easily. So does that mean the traditional camera will eventually become outdated? Figures from Japan show how the market is shrinking: shipments of compact digital cameras from companies like Olympus, Canon and Nikon were down 39 percent year on year.

But Phil Hall, editor of Tech Radar magazine, told the BBC that while people are swapping their compact cameras for smartphones, "manufacturers are looking at the more higher-end cameras, high-end compacts, DSLRs, which are the ones you can attach lenses to, mirrorless cameras. In this sense, there's nothing to worry about. "