we are standing on the ground, rainbows seem to stop when they hit the ground. This is because... like arches (拱形), but they are actually round. When we are standing on the ground, rainbows seem ……

on top of sand. Imagine that these are people standing on the ground.2. Stand toys on top of sand. Imagine that these are people standing on the ground.3. Pull ends of sheets slowly and watch ……

it down well.2. Stand toys on top of sand. Imagine that these are people standing on the ground.3. Pull...在家里制造“小地震”。This is a way to see what happens to the ground in an earthquake. You will need• ……

on top of sand. Imagine that these are people standing on the ground.3. Pull (拉) ends of cloth or plastic slowly. Now watch what happens.What happened?• The “ground” that the toys are standing ……

! It is 435 meters high but only 18 meters wide. It looks like a pencil standing on the ground!Could... building in the world! It is 435 meters high but only 18 meters wide. It looks like a pencil standing ……

in the mountains. However, when I saw two boards 80 cm apart standing on a 7-meter-high pillar (柱子), I got butterflies in my stomach. Would I need to do something while standing on a board?My happiness ……

above the ground, my legs were shaking like jelly (果冻) to the point that I couldn’t move. Even though I was still standing on the ground, I felt scared. To my surprise, a young man who was standing next ……

! Did gravity disappear? No. You are still standing on the ground. Then the best explanation is an ……

) and bounced (反弹) around the table. Did gravity disappear? No. You are still standing on the ground ……

超级敬业的摄影师。NATURE photographers (摄影师) often do everything for a picture. This man is on fire (着火了)! He is Kawika Singson, a photographer from the US. He is standing *beside a volcano (火山). The ground ……

he does crazy6 things for a good photo. Look at him in the picture. He is standing beside a volcano. The ground is so hot. It sets fire (起火) to his feet! ……

. They try to knock each other to the ground. The last one still standing on the stilts wins.We like... to the ground. The last one still standing on the stilts wins. ……

standing up. During birth, baby giraffes will drop to the ground (地面). They fall 1.8 m to the ground, because a giraffe’s legs are about 1.8 m long. Their hooves (蹄) and head hit the ground first.Baby ……

你的眼睛被骗了吗？WHY do the girls want to jump off the building? Help! Don’t worry. It is not a real building. In fact, they are standing on a painting on the ground! The painting is a work by British chalk ……

-falling stroke (撇) and a right-falling stroke (捺). It looks like a person standing on solid ground (脚踏... like a person standing on solid ground (脚踏实地). Chinese people believe a good person should be like ……