, sprawling desert. Dakar competitors regularly get lost, run out of fuel, get stuck in the sand and even ……

Wet sand for some reason weighs less than dry sand. ……

CRABHANDCANSANDMAN. ……

The color of sand is usually white and yellow. In Hawaii (夏威夷), there is a green sand beach. Lots of green special stones make up the sand. ……

a super-slippery toilet bowl (超光滑马桶). Nothing can stick to it. Scientists used plastic (塑料), sand.... Nothing stuck. The scientists also sandpapered (用砂纸打磨) the bowl 1,000 times. It’s still ……

地球上的沙子就快要被耗尽了Where can you find sand? You can find it in deserts (沙漠), beaches and playgrounds. But did you know that sand is useful? It is the second most-used resource (资源) in the world after water ……

为什么这种沙滩浴看起来那么像恐怖片呢? PEOPLEbury(埋) them up to their necks into sand. They are having a sand bath. Sand baths have a history of more than 300 years in Japan. Many people like a sand bath because ……

我们玩耍的沙坑安全吗？我们玩耍的沙坑安全吗？  In Germany, 12-year-old Clara saw her little brother eating sand from a playground sandbox. Yuck! That made her wonder: Could the sand be dangerous? To find out ……

A Grain of SandTo see a world in a grain of sand And a heaven in a wild flower, Hold infinity (无限) in the palm of your hand And eternity (永恒) in an hour.By William Blake (English poet, 1757-1827) ……

A Grain of SandTo see a world in a grain of sand And a heaven in a wild flower, Hold infinity (无限) in the palm of your hand And eternity (永恒) in an hour.By William Blake (English poet, 1757-1827) ……

Camels actually have three eyelids (眼皮)! Two of them have lashes. They all protect their eyes from sand. ……

人类下一个资源危机：沙子即将被耗尽。词数 270 测试见IV版 建议阅读时间 7分钟 From deserts (沙漠) and beaches to playgrounds, sand is a common sight. But you might not know that sand is also a useful resource (资源). Sand is the second ……

they decided to take a bath. The one who had been slapped got stuck in some thick sand and started drowning... been slapped got stuck in some thick sand and started drowning (溺水), but his friend saved him ……

a bath. The one who had been slapped got stuck in some thick sand and started drowning (溺水... slapped was hurt. But without saying anything, he wrote in the sand (沙子), “Today my best friend ……

From deserts and beaches to playgrounds, sand is common to see. But you might not know that sand is also a useful resource (资源).From deserts and beaches to playgrounds, sand is common ……