4 . We may think we're a culture that gets rid of our worn technology at the first sight of something shiny and new, but a new study shows that we keep using our old devices(装置) well after they go out of style. That’s bad news for the environment — and our wallets — as these outdated devices consume much more energy than the newer ones that do the same things.

To figure out how much power these devices are using, Callie Babbitt and her colleagues at the Rochester Institute of Technology in New York tracked the environmental costs for each product throughout its life — from when its minerals are mined to when we stop using the device. This method provided a readout for how home energy use has evolved since the early 1990s. Devices were grouped by generation — Desktop computers, basic mobile phones, and box-set TVs defined 1992. Digital cameras arrived on the scene in 1997. And MP3 players, smart phones, and LCD TVs entered homes in 2002, before tablets and e-readers showed up in 2007.

As we accumulated more devices, however, we didn't throw out our old ones. "The living-room television is replaced and gets planted in the kids' room, and suddenly one day, you have a TV in every room of the house," said one researcher. The average number of electronic devices rose from four per household in 1992 to 13 in 2007. We're not just keeping these old devices — we continue to use them. According to the analysis of Babbitt's team, old desktop monitors and box TVs with cathode ray tubes are the worst devices with their energy consumption and contribution to greenhouse gas emissions（排放）more than doubling during the 1992 to 2007 window.

So what's the solution（解决方案）? The team's data only went up to 2007, but the researchers also explored what would happen if consumers replaced old products with new electronics that serve more than one function, such as a tablet for word processing and TV viewing. They found that more on-demand entertainment viewing on tablets instead of TVs and desktop computers could cut energy consumption by 44%.

5 . We’ve all been there: in a lift, in line at the bank or on an airplane, surrounded by people who are, like us, deeply focused on their smartphones or, worse, struggling with the uncomfortable silence.

What’s the problem? It’s possible that we all have compromised conversational intelligence. It’s more likely that none of us start a conversation because it’s awkward and challenging, or we think it’s annoying and unnecessary. But the next time you find yourself among strangers, consider that small talk is worth the trouble. Experts say it’s an invaluable social practice that results in big benefits.

Dismissing small talk as unimportant is easy, but we can’t forget that deep relationships wouldn’t

even exist if it weren’t for casual conversation. Small talk is the grease(润滑剂) for social communication, says Bernardo Carducci, director of the Shyness Research Institute at Indiana University Southeast. ＂Almost every great love story and each big business deal begins with small talk,＂ he explains. ＂The key to successful small talk is learning how to connect with others, not just communicate with them.＂

In a 2014 study, Elizabeth Dunn, associate professor of psychology at UBC, invited people on their way into a coffee shop. One group was asked to seek out an interaction(互动) with its waiter; the other, to speak only when necessary. The results showed that those who chatted with their server reported significantly higher positive feelings and a better coffee shop experience. ＂It’s not that talking to the waiter is better than talking to your husband,＂ says Dunn. ＂But interactions with peripheral(边缘的) members of our social network matter for our well-being also.＂

Dunn believes that people who reach out to strangers feel a significantly greater sense of belonging, a bond with others. Carducci believes developing such a sense of belonging starts with small talk. ＂Small talk is the basis of good manners,＂ he says.

Thank you for listening!

China plans to complete the construction of a space station and have    1    put into operation around 2022, said Zhou Jianping, the chief designer of China's manned space program, at a forum (论坛)    2    (hold) in south China's Guangdong Province. The space station,    3    could be enlarged if needed,    4    (design) to weigh 100 tonnes and accommodate three astronauts, according to Zhou.

“The main goal of the construction or the space station is to enable China to become a country    5    (independent) mastering the technology for long term manned flight in near Earth space, and having the capacity to carry out long-term manned scientific    6     (experiment) in near Earth space and comprehensive development and utilization (利用) of space resources,"    7    (say) Zhou at the 4^th China Summit Forum on Human Factors Engineering, which was held at SunYat-sen University from Saturday to Sunday.

The space station will be built as China’s main platform for space science research    8    the intention of mastering the technologies in constructing and    9    (operate) large space facilities, the technologies that guarantee life and health of astronauts who often fly in orbit, and the construction of a    10    (nation) space lab, according to Zhou.

10 . My best friend traveled to stay with our family last weekend. When she arrived, she went straight to the kitchen and, without asking, ate a spoonful of raspberry jam and some dried fruit. She wasn’t being rude. I knew she would do this. We’ve known each other for almost 20 years. She can eat anything she wants from my kitchen. Indeed, I bought her favorite fruits and snacks at the shop that morning.

Our long weekend together was luxuriously (惬意地) simple. I was recovering from surgery (手术) and couldn’t go to shopping malls. We passed the time running errands (做杂事), going to the post office and collecting dry cleaning. We drank way too many cappuccinos. But we talked about every little detail of our lives.

There’s never been a quiet moment in our friendship. We’ve lived in different cities for almost a decade. Reunions demand constant conversation. our personalities are matched, to be sure, and a shared history is indescribably valuable. We were competitors in high school before bonding over a bad experience. Then we discovered the many interests that we had in common. Our friendship cemented (巩固) itself quickly. We stayed companions through law school, through our first jobs and our first boyfriends. We supported each other through break-ups and breakthroughs. Ours is a friendship for the ages.

There is something special about friends who know everyone and everything about you. They are rare. These are the people you’ve chosen to witness your life. They have seen the bright lights of achievement, the depths of despair (绝望) and the boring routine (平淡乏味) of the in-between.

It’s special to unpack feelings and frustrations without wasting time filling in the blanks. As my long weekend shows, with such friends we don’t have to “do”, we simply have to “be”. We drop the act, the performance, the public version of ourselves.

The special friendships are those which never fail to delight, the continuation of which is worth the extra effort, despite distance and difference sneaking (溜进) into your separate lives. I had the very great joy of this reminder last weekend. I’m lucky to have found this friend, to see a future where her companionship remains. Being together is perfection.