The following are to help you find the train tickets most suited to your needs when you are in the UK.

The Student Railcard

The Student Railcard (or Young Person Railcard) is a great way to keep travel costs down. The 1/3 off train tickets can go a long way in helping you save, ideal for travelling to work, university or college. Whether you have an early morning lecture or you’re rolling home in the early hours after a night out, you can still get 1/3 off on all passenger rail services within the UK! The only requirement for this Railcard is that you need to be within the ages of 16 and 25, and able to prove it with ID.

The Family &Friends Railcard

Up to four adults and four children can use the card on big days out. Adults get 1/3 off train travel and children get a 60% discount on their fares with a Family &Friends Railcard. Children are classed as being between ages 5-15.

It can be purchased and used within 16 counties in the South East, even including the whole of London! Just remember that all users must stay together while travelling—in the same carriage and on the same train.

The Millennial Railcard

The Millennial Railcard is now available across the UK, helping “millennials” to save money on their day-to-day train ticket fares while encouraging more leisurely train travel on days off.

It is available for all who are between the ages of 26 and 30, regardless of peak or off-peak times. Costing just £30, the new Railcard can be used across the UK!

The Saver Railcard

Half off train tickets. That’s right, half! Pick up the new 16-17 Saver Railcard and let the savings pile up. It costs just £30 for the year or up until the date of your 18th birthday, making it one of the best value Raileards considering the kinds of discounts you can get.

The Saver Railcard can be used throughout the UK rail network. However, it is currently only available digitally. You need download the Railcard app and show ticket inspectors during ticket checks.

Two square meters of the next-generation perovskite solar cells (PSCs) would be enough to generate (产生) about as much electricity as a standard solar panel, according to the latest study.

Solar cell windows are something researchers have been working on for years, but as yet no one has really hit the sweet spot in terms of efficiency, stability and cost. The team behind the new project says they are closer than ever to doing just that.

Rooftop solar has a conversion (转化) efficiency of between 15 and 20 percent. The semi-transparent (半透明的) cells have a conversion efficiency of 17 percent, while still letting more than 10 percent of the light come in.

Central to the work is the replacement of key solar cell component (Spiro-OMeTAD to be technical) with a specially developed polymer (聚合物), based on an organic semiconductor, which increases overall stability.

That stability is important in material that is out in the sunshine all day. Add the recent efficiency increases in PSCs and you can see why this growing solar technology is becoming more and more commercially attractive.

However, you won’t be able to gaze through a perfectly clear window and get the maximum amount of energy efficiency from it—there’s still a balance to be found between opacity (不透明) and efficiency.

“There is a trade-off,” says Jasieniak. “The solar cells can be made more, or less, transparent. The more transparent they are, the less electricity they generate, so that becomes something for architects to consider.”

Even with this major step forward, it may be some time—maybe as much as 10 years—before the tech can be commercialised and scaled up. The scientists are working with business partners to try and get the solar cells included in future building plans.

“These solar cells mean a big change to the way we think about buildings and the way they function,” says Jasieniak. “Up until now every building has been designed on the assumption that windows are fundamentally passive. Now they will actively produce electricity.”

Most of us, at some point in our lives, have decided we need a new look. Then, when we don’t achieve the desired six-pack within a month, we gave up the fitness plan. Fortunately, there is a way to set realistic, useful fitness goals that will keep you motivated.

Keep in mind that exercise alone won’t change your body shape.    36     “People underestimate the amount of effort physical transformations take,” says Hannah Lewin, a personal trainer.

Consider what is important to you. A lot of people want to look like someone else. That’s where a lot of goals go wrong from the outset, because they are choosing a goal based on someone else.    37     Make it your own. Tailor it to yourself.

The personal trainer Ruby Tuttlebee advises starting small and building up. Something straightforward, such as a press-up, is a better bet than aiming for a triathlon right off the bat.    38     When you have mastered a perfect press-up, set a new goal of five press-ups in a row, then 10, and then 20.

Choosing something you enjoy will help.    39     Training with a friend or a personal trainer can also keep you on track, when your motivation slips.

Keeping score is also a good idea. Keeping score gives people tangible things they can work on and helps direct their focus to keep them on track day to day.

    40     Even if just walking through the door of your gym is your first goal, you’ve achieved it—so well done.

Moscow has been so warm this December that the government has resorted to sending trucks     61     (fill) with artificial snow to decorate a new year display in the city centre.

The Moscow region is witnessing one of its     62    (warm) winters since temperatures began to be systematically recorded 140 years ago. The temperature in the Russian capital     63     (rise)to 5.4℃ on 18 December, topping the previous record for the month set in 1886.

    64     (concern) are growing about the effects of heating on Russia. Permafrost under the country’s northern towns is slowly melting, and the mild December weather has interrupted hibernation(冬眠) at the Moscow zoo. The most visible impact,    65     has been the lack of snow, which     66     (usual) begins blanketing Russia in October or November.

City officials said the artificial snow had been brought in for snowboarding demonstration(示威游行)    67     would begin on New Year’s Day. The snow was produced by cutting ice from a local skating rink. An official said during a televised press conference last week that the crisis was a direct threat     68     Russia.

Nobody really knows the causes of     69     (globe) climate change,” the official said,    70     (add) that people should nevertheless make their best efforts to prevent dramatic changes in the climate.