. Why is it hard to see the road in the mountains?2. Why is it hard to see the road.... Where are the Ailao Mountains?1. Where are the Ailao Mountains ……

growing taller?Why can’t we keep growing taller?We grow taller because our bones (骨头) grow... puberty (青春期), the growth plates become fully grown. At the end of puberty, they stop growing. So we can ……

? The answer is yes, according to scientists in Italy. Our bones stop growing after puberty (青春期). Our muscle (肌肉) and fat cells also stop dividing (分裂). But our cartilage (软骨) keeps growing until ……

Big eyesOur eyes are always the samesize(尺寸) from birth, but our nose and ears never stop growing. ……

Our eyes are always the same size from birth, but our nose and ears never stop growing. ……

Our eyes are always the same size from birth, but our nose and ears never stop growing. ……

动物秘密A rabbit’s teeth never stop growing its whole life. ……

. In the winter, the trees turn yellow and the rivers all freeze. But the Qinling Mountains stop the cold air... plains (平原) in the north and more mountains in the south. What are some differences between the two ……

“要命”的极限运动，究竟魅力何在？They climb cliffs without a safety rope. They jump off mountains without a parachute. Why would people risk their lives to do these things? ……

, the tallest mountain in the world. But what stops mountains from growing forever? Two major factors... growing forever? Two major factors (因素) – gravity (重力) and rivers – limit mountains&rsquo ……

compass (指南针) stop working. The Ailao Mountains sit in the heart of Yunnan. They are easy...The Ailao Mountains have thick fog.  VCG  Yunnan’s Ailao Mountains are beautiful ……

mountains. They stop water vapor (水汽) from coming to the city.Lima is close to some big mountains. They stop...;  Why is Lima so dry?Why is Lima so dry?Lima is near the sea. The cold seawater makes ……

Why does your cat sit on your homework? She is saying: "Stop it and play with me!" ……

and are close to more rivers and lakes. So why are they still short on water? In big cities like Shenzhen and Guangzhou, populations are growing fast. As a result, people and factories need more ……

Stop watering hairLittle Robert was in the bath tub, and his mom was washing his hair. She said to him, "Wow, your hair is growing so fast! You need a haircut again."Little Robert replied, "Maybe you ……