【推荐2】Playing sports is a lot of fun, but getting hurt is not.     1    

Wear protective equipment.

The equipment you wear depends on the sport you play. Helmets (头盔) are the most common protective equipment. They protect your head while you’re playing football, baseball, softball, biking, skateboarding, and so on.

Warm up.

    2     Doing some stretching (伸展) can get you prepared to hit the field. By warming up, you get yourself ready to play. Warming up your muscles and practicing a sport help keep you safe, too.

Know the rules of the games.

Traffic lights help prevent crashes between the many cars that drive on the roads together. This works because drivers know the rules and follow them.     3     When players know the rules of the game, fewer injuries happen. For example, you know that in soccer you can’t come from behind, crash into a player’s legs, and steal the ball.

    4    

Some rules don’t have anything to do with scoring points. Some rules are just about protecting other people. For example, a diver would make sure that the pool was clear before diving in. Otherwise, he or she might land on someone else.

    5    

This is a really important one. If you love sports, you may get right back in the game, even after an injury. But playing when you’re hurt is a bad idea. It can lead to an even worse injury.

【推荐3】Americans spend nearly 40 minutes a day cleaning their homes. Fortunately, you can re-gain those precious minutes with these genius cleaning tips that only the professionals know     1    !

Freshen up your garbage disposals (处理器)with some lemons.

With all the junk we throw into our garbage disposals, it's no wonder that they're real petri dishes (培养皿)with the awful smell to prove it. Thankfully, making them a whole lot cleaner is easy： Simply drop some cut lemons down your drain.    2    .

Make the bathtub clean with grapefruit and salt.

    3    . So the next time you’re at the supermarket, make sure to throw an extra grapefruit into your cart—not for eating, but for cleaning. Just cut the fruit open and cover it in salt. The salt creates a special texture while the acid in the grapefruit will help break down stains.

    4    

Research published in 2015 in Scientific Reports suggests that our coffee makers are an absolute hotbed of bacterial activity, which means that we might just be taking in some of that disgusting stuff along with our dark roast.     5    ? A monthly vinegar wash should do it. Simply fill your coffee maker's reservoir with a few tablespoons of white vinegar mixed with water, run it once more with only water to remove any remaining vinegar smell.

【推荐1】Open an app at your smart phone and scan the code bar (二维码) on the garbage can. When you throw garbage into the garbage can, it will show the weight of the garbage and the points you can get from doing so.     1     It will become more popular in the future. Yes, we are talking about the smart garbage can.

    2     The environmental problems have become constant headaches in the development of the cities. Encouraging garbage classification has become an effective way.

In some cities, a variety of multifunctional smart garbage cans are being put into use. In Beijing, for example, a smart garbage can is equipped with an LED screen, which not only shows national policies on garbage classification but also shows the correct steps for garbage sorting. It can also calculate the weight of the garbage and the accumulated points one can get. They can be traded for some articles of daily use.     3     Its body is actually a screen. It is equipped with some internal sensors. When people throw garbage into it, the internal sensors can automatically tell the types of the garbage. Meanwhile, people can see how to deal with them.     4    

Garbage disposal is a small issue that involves everybody each day. However, it is also a big issue.     5     With smart garbage cans in our daily life, the idea of garbage sorting will become more established. Our dream of building a greener and more beautiful China will come true so long as we start to make small changes right now.

【推荐3】China still dumps most of the garbage it generates in landfills, which could pollute soil, water and air. Today, China is facing a problem similar to the one Japan faced in the 1970s, especially in its coastal cities which have a relatively high economic growth rate and a large population but comparatively limited land space, resulting in serious environmental pollution.

China has just started its garbage sorting journey, and it will take time for the people to make it a habit of sorting garbage at source.

Shanghai is among China's first cities to introduce garbage classification and also the country's most serious in its performing. Since July 1, 2019, Shanghai residents have been required by law to sort garbage into four different categories, or they could face fines. Individuals, including tourists, can be fined up to 200 yuan for failing to sort their waste properly, while companies and institutions can be fined up to 50，000 yuan.

The city government has set up online apps to handle sorting questions, and announced guidelines to address the "one-size-fits-all" method. The country is about to invest over 21 million yuan in the construction of garbage processing facilities to meet demands.

Following Shanghai, Beijing is also pushing ahead with garbage sorting legislation (立法) in the continual national action to get all of China sorting garbage. Not forced yet, the Chinese capital is already carrying out garbage sorting in more than 200 residential communities and it's trying to get more residents on board by making the system smarter. Now it's introducing artificial intelligence into its waste management system, by setting up little cameras in many sets of bins.

However, not every face can be recognized by the smart dustbin until you register (注册) for the system. Once registration is complete, users will scan a QR code on the bin, which then opens it up to allow for garbage disposal (处理). Now, each household gets one special QR code for throwing out waste. Here, the intelligent bins don't just calculate garbage weight, they also help residents gain rewards by collecting points through the special app.

China welcomes the age of compulsory garbage sorting with its cities revising laws on garbage classification. For Shanghai, sixty percent of the city is expected to implement garbage sorting by the end of this year, and 90 percent by 2020. Garbage sorting is, without doubt, a costly but worthwhile commitment. It is good for the environment and essential for the country's long-term development, and may finally turn out to be a promising industry as well.