, taken a shower and brushed your teeth. But it’s not yet time for bed – not until you’ve checked your.... In ancient times, when there were no lamps, televisions or smartphones, the sun was the main source of light ……

dentist can even damage more than your teeth. The Beijing Dental Professionals' Association investigated... woman in "Shaolin Soccer"(Shaolin Zuqiu). But suddenly Zhao had bright white teeth and a more ……

that anyone can keep alive and *thriving. Why not let these green plants decorate your room, clean the air... it will cause leaf and crown *rot. It tolerates low light but performs best with medium to bright ……

屋里有个大“太阳”Can the sun come indoors? In the UK, it can. In a shopping center in the UK, there is a big and bright orange ball. It is 15 meters wide. The ball can shine. It is as bright as 12,000 light ……

us speak clearly. And yes, they help us look good.How can we keep our teeth strong and healthy? Take.... *It’s on September 20. How important are teeth to our life? What should we do to keep our teeth healthy? Follow ……

秘密). But the lack of light can be a problem if you actually want to be able to read what you wrote someday... bright light that pops right out of the book's spine (书脊). When you're done recording your deepest ……

crooked teeth. Don’t worry. Here are some ways to keep your teeth healthy. Brush at least twice...? Bones? It’s your teeth! There is a special thing called enamel (牙釉质) in teeth. It is the hardest thing ……

sleep. So, you’d better keep them clean before going to bed.Let’s sing a song: Brush Your Teeth Brush your teeth, brush your teeth, give them all a treat4.Brush up and down and all around, to keep them ……

with the plaque problem. It can also keep your teeth strong and healthy.6. Brushing teeth well twice a day with toothpaste (牙膏) can deal with the plaque problem. It can also keep your teeth strong ……

to keep your teeth healthy.The most common way is tooth brushing. Long ago, people used charcoal (木炭... your teeth clean enough, what can you do? A dental floss (牙线) works. It gives teeth a deeper clean ……

, bright water helps fish and plantsThe ocean's top layer is thesunlit zone(透光层). It goes down to around 200 metres below water. This layer is warm and bright. It is also home to most plants and fish. Many ……

a light body and makes me happy."Xu Li has strong, white teeth. She is only nine years old but has already made many TV adverts fortoothpaste(牙膏). Xu knows good ways to keep your teeth healthy. "Have milk ……

精灵古怪的电动仓鼠Many kids like to keep hamsters (仓鼠) as pets. Hamsters are very cute. But they can also.... The boy with bright yellow fur is Pipsqueak. He has a lot of energy6.The boy with light brown fur is Mr ……

Most frogs have teeth. Their small teeth are on the roofs5 of their mouths. So we can’t easily see them. ……

霸王龙“凶不露齿”！霸王龙“凶不露齿”！In movies, T. rexes often show sharp teeth. But in real life, they may... could be seen.In movies, T. rexes often show sharp teeth. But in real life, they may be different ……