【推荐3】Know More about the Winter Olympic Games

Teeth are important to everyone. National Teeth-Loving Day is on September20. Do you know the life cycle of teeth in your mouth? Children under 6 years old have 20 baby teeth. From 6 to 13, people lose their baby teeth one by one. Now permanent teeth（恒牙）begin to grow. Between the ages of 17 and 25, some people grow wisdom teeth （智齿）. Of course, wisdom teeth don’t make you any smarter. They look like a symbol of being grown-ups（长大）.

Do you know any ways of keeping our teeth strong and healthy? Let’s look at the following tips.

What we can do:

Brush your teeth at least twice a day: in the morning and before bedtime.

Brush for at least two or three minutes every time.

Brush up and down on every tooth.

Use a dental floss（牙线）for your teeth to make them cleaner if necessary.

Get a new toothbrush every three months.

What we can’t do:

Don’t eat too much food like candies and don’t drink too much soda.

Don’t eat very hard food. That can hurt your teeth.

Don’t eat snacks before bedtime.

Healthy teeth help us eat food to let us grow. They help us speak clearly. And yes, they help us look good.

【推荐2】Tantou New Year Picture

【推荐3】On the bottom of most plastic packaging（包装）, there’s a small triangle（三角）with a letter or a number written inside. These little symbols are not easy to be noticed, but are really important. They tell you what kind of plastic it is and whether it can be recycled or not.

Can it be recycled?	Types of Plastic
	PET is the plastic that you often see on supermarket shelves! It’s used to make plastic water bottles and biscuit boxes.
	HDPE is a stronger type of plastic. It is what milk bottles are made of
	LDPE is a very soft plastic which is not easily broken. It is what shopping bags are made of.
	PS is the plastic that is often seen in our daily life. You’ll probably have seen it as those cheap white cups you get hot drinks in, or as takeaway food packaging.

【推荐1】“Early to bed, early to rise, makes a man healthy, wealthy and wise.” This is an old English saying. Have you heard it before? It says that we must go to bed early at night and get up early in the morning. Then we shall be healthy. We shall also be rich (wealthy) and clever (wise).

This is true. The body must have enough sleep to be healthy. Children of a young age should have ten hours’ sleep every night. Children who don’t have enough sleep can’t do their work well. They will not be wise and they may not become wealthy!

The body also needs exercise. Walking, running, jumping and playing games are all exercise. Exercise keeps the body strong. Exercise also keeps the blood moving around inside the body. This is very important. Our blood takes food to all parts of our body. The head also needs blood.

Exercise helps us to think better.

Facing our future

The face is usually the first thing you notice when looking at someone. Everyone has something about their face that’s a little different. And that little difference makes facial recognition possible.

You can find this technology in many popular films. In the sci-fi classic 2001: A Space Odyssey, a powerful computer is able to “read” the emotions (情绪) of astronauts by scanning (扫描) their faces. And in the 1987 action film Robocop, a cyborg (半人半机器) police officer identifies (识别) a criminal by scanning his photo on a computer.

Today, facial recognition tech is no longer just in films. It has been used as a security measure (安保手段) or to identify threats (威胁).

For example, in 2018, facial recognition technology helped identify and catch criminals who were attending concerts by Hong Kong singer Jacky Cheung. And if you use a recent model of Apple’s iPhone, you can unlock the phone with your face. But these are just a few of the things we can use facial recognition for. The possibilities (可能性), it seems, are endless (无尽的).

Grab, a ride-hailing (叫车服务) company in Southeast Asia, is developing facial recognition technology that can keep passengers safe. The technology works by scanning both the driver’s face and the passenger’s face. This way, passengers can be sure that their driver is the correct one.

Retailers (零售商) are also looking to facial recognition technology to drive (促进) business. With the technology, retailers are able to “see” what their shoppers are actually looking at in stores. Later, they use this information to provide suggestions (建议) for customers in the future.