is not limitless and that we might be running out of it.Sand is made up of very small pieces of rock, soil and minerals (矿物质). It can take tens of thousands of years to form (形成). But now we are using sand ……

; china dailyFrom top: Passengers have their tickets checked as they walk out of the Qiemo station... county, Hotan prefecture. Outside the window, sand dunes (沙丘) of the Taklimakan Desert ……

. But we are using sand too fast. One day, we may have no sand left to use.Many uses of sand:Build.... It is 829.8 meters tall. It took a lot of sand to build it.How much sand do we use?We use about 15 ……

on the hard ground,” Zamparo said. Walking or running across sand is much easier on your joints... on the hard ground,” Zamparo said. Walking or running across sand is much easier on your ……

water running through the burning sand.Until we learn to love one another,We will never reach ……

might be running out of it.Sand is the second most-used resource in the world after water, the BBC reported. However, the UN said that sand is not limitless and that we might be running out of it.Sand ……

YO-O-H-O-H-H-H! Here we are, Xiangshawan (Resonant Sand Gorge), my long-cherished place! No trees, no streams, but undulating sand through and through. I stood dumbfounded by its vast expanse, like ……

知道吗？并不是所有冰川都是白色的呢！
of Sichuan, not far from Tibet.Before we set out, many local people warned us of the dangers along the way, with highcliffs(悬崖) and the risk of rock falls. And they were right.We drove for about five hours ……

to go out into the wild, we hope to avoid hungry wild animals with sharp teeth. But for Williams... across a cougar (美洲狮) in the wild.Go in a group“Hiking alone is always a concern (担心的事) and running ……

rooms to venture out (探险) into the wild, we hope to avoid hungry wild animals with sharp teeth... and running alone is always a concern, because you can have that short range encounter (遇到) with a bear ……

the feeder1.  Place the card on a baking sheet and set out a few bowls of colored sand, a dish of white... sheet and set out a few bowls of colored sand, a dish of white glue and several cookie cutters.1.  ……

)?”“They are there to keep the sand out of your eyes in the desert.”After a short while, the son asked again: “Mom, why..., why do I have these huge three-toed (三趾的) feet?”The mother replied: “Well son, when we walk across ……

up, lets keep on runningDon't let me fall out of loveRunning, runningAs fast as we canI really hope you make it(Do you think we'll make it?)We're runningKeep holding my handIt's so we don't get ……

and the water will get cloudy from all the sand. Sometimes, we just need to sit and relax and allow our thoughts and feelings to settle (安定下来). As we watch the jar, what happens to the sand? The sand ……

sand into the lion’s eyes and ran away. The second man stayed. He didn’t run. The first man looked back and shouted, “Why aren’t you running?” The second man answered: “Why should I be running? You’re ……