【推荐1】Email is one of the Internet’s oldest apps — from the days before we used the word “app” even — and despite its drawbacks, most of us still use it every day.

Typically, the apps we download in 2020 have been _________for mere days or months. We are used to the pang of regret when really useful software suddenly winks out of existence. How has email remained a(n) _________ for nearly years? Yes, it is helpful that email is based on a(n) _________ communications medium that stretches back to some of the first examples of written language. But that isn’t the full story.

First, email managed to survive massive upheavals in the way we use computers. In the early 1970s, when email was born, it was almost _________ a tool for researchers, university students and engineers. You would send, receive and store your email on a work computer. With the _________ of personal computers in the 1980s and 90s, email became something you kept on your own private machines or disks — almost like storing old letters in a shoebox. Now we have come full circle. Most of us store our personal mail in the cloud, which is _________ like storing it on somebody else’s work computer.

It is extremely rare to see apps make the leap from one platform to another like email did. They tend to _________ in the journey from web to mobile, or from one game system to another.

As well as _________ dramatic tech changes, email dealt with another major hurdles — spam (垃圾邮件). In the 1990s and early 2000s, people’s inboxes were _________ with so much junk that it was impossible to find the stuff you wanted. You had to install another program — a spam filter — just to use your email program. But in the age of cloud mail, anti-spam systems have become so good that it is __________ to see one of those quaint old subject lines touting (标榜) “VI@grs@!” or “pron” to get around word filters.

And yet, __________ its heroic triumph over tech obsolescence and spam, email isn’t exactly alluring (吸引人的). We use it mostly for official __________, automated reminders and shopping receipts, along with the occasional bit of personal news. Though email communication is practically instantaneous, it feels __________. Why email when you could text?

Perhaps that is the point. Email isn’t a brand-new way to __________ nor is it juiced up with memes and not takes. But we are still opening G-mail or Hot-mail every day because it works and everybody has it. Under the hood, email uses protocol (数据传递的协议) that keeps trying to send data, over and over, hoping that it can outlast network problems. It doesn’t give up. And somehow, by trying really earnestly, it has __________ the computers where it has born and the spammers who tried to defeat it.

【推荐3】From using a smiling emoji in messages to saying “cheese” when taking photos, most people believe that a smile is a sign of happiness. ________ some scientists don’t think so.

The ________ between smiles and happiness was recently studied by researchers at Brighton and Sussex Medical School(BSMS) in the UK. Their ________ found that smiling doesn’t necessarily show a person’s gladness. Instead, it usually ________ a tool in social contact.

In the study, 44 people aged between 18 and 35 took part in a quiz. The ________ had to answer nine difficult questions, while their facial expressions were recorded by computers.   The participants were then asked to rate(评估) their own experiences when answering the questions. They were given 12 different emotions to ________, including “bored” and “interested”.

According to Science Daily, people always ________ the experiences that made them smile with “engagement(参与)”, ________ “happiness” or “interested”.

We normally associate a smiling person with cheerfulness. ________, a smile is more likely to be caused by a feeling of ________, reported Indian newspaper The Asian Age.

In order to ________ explain these results, the researchers checked the ________ of the participants answering each question.

According to the journal News Medical, the participants didn’t show any signs of smiling in their images when they were trying their best to find out the right answer.

However, when they were told whether their answer was ________ or not, they smiled. And more ________, they smiled more often when their answers were incorrect. It showed “their enjoyment of this game,” according to Science Daily.

“This ________ could be explained by self-ratings of engagement, rather than by ratings of happiness or frustration,” body language expert Harry Witchel told Science Daily.

【推荐2】Fitness experts weigh in on whether it’s safe to skip this sometimes annoying step in your exercise routine.

One of the most important steps in your fitness routine comes at the conclusion. Many know the importance of properly warming up and preparing to exercise, but experts say that incorporating a cool down routine is just as important. According to the Mayo Clinic, cooling down allows for your body to recover and return to its normal, _________ state.

Though cooling down isn’t proven to _________ muscle stiffness or soreness, it can prevent dizziness and allow your heart rate and breathing to ease back to a normal rate, Harvard Medical School reports. Phyllis Mammarelli, personal trainer at the Shenango Valley YMCA in Sharon, Pennsylvania, works with each of her clients on a cool down routine as she says it’s a (n) _________ part of exercising.

“Cooling down allows your body to gradually return to a low-intensity activity level, slowly reducing your respiratory and heart rate until it’s equalized and back to normal” she says.

_________ the recovery phase of a workout isn’t proven to be harmful to your body, but Mammarelli warns that without cooling down, the body will take longer to return back to the low-intensity level activity level you began your workout with.

There are also non-threatening side effects that could occur as a result of forgoing a cool down. Mammarelli warns that blood can gather or pool in your lower extremities and lead to dizziness and _________. Additionally, ACE says to keep an eye on your _________ soreness and stiffness. While soreness after a workout is to be expected, _________ onset muscle soreness can occur 24 - 28 hours after your workout and cause “uncomfortable debilitating pain”. Side effects are mostly seen in the elderly or those with cardiovascular disease and can be _________ by warming up and cooling down. Here are some other signs that you might be working out too much.

Allow five to 10 minutes at the _________ of your workout for a cool-down routine. During this period, continue your workout session, but at a much reduced rate. If you’re __________ for time during your workouts or unsure how to allow your body to recover, Mammarelli suggests stretching muscles in a pain-free range of __________. Here’s an easy stretch __________ to try.

Tacking on a few __________ minutes to your workout for cooling down may seem like a(n) __________, but the benefits outweigh the cost of finding extra time in your __________. If you need inspiration for scheduling the time to workout and cool downlook to these women who work out every day.