a flying sun. Ancient humans were afraid of the sight of comets (彗星). Many cultures believed that comets... ended its million-year-long journey as it flew straight toward the sun, melting most of the comet ……

Less flying... more walking. ……

Less flying... more walking. ……

. Volitan, its name, means "flying fish". Thecomputer-controlled(电脑控制的) boat is made to be aseco-friendly(环保的) as possible. It uses sail, wind and sun power to get around, storing energy in its ……

学校里的小小飞行员What club1 are you in at school? Maybe you would like the flying club in Wanquan Primary School in Tianjin Heping district (天津市和平区万全小学). Sun Yihao is a fourth-grader in this school. He ……

keep flying forever. Well, actually, the sun will run out too, one day, but not for another 5 billion... that the Earth moved. They thought the sun really did move across the sky. The Greek god Helios was said ……

) the house as she pleases. She can turn the bedroom to face the sun, for example. Kusic never had... now spin (转) the house as she pleases. She can turn the bedroom to face the sun, for example. Kusic ……

战斗机。 是赛车，也是战斗机。Are you a fan of racecars (赛车)? How about a flying one? Airspeeder, a flying... a helicopter (直升机) and a fighter jet (战斗机). It will take part in a flying car competition in 2022 ……

There is real1 gold in the sun. ……

FLYING garbage (垃圾) bags? That's a funny thought. But it's possible. A garbage bag can become a hot... and wait. The bag will try to get off the ground as the sun's rays (光线) heat (加热) it. It will get ……

FLYING garbage (垃圾) bags? That's a funny thought. But it is possible. A garbage bag can become... and wait. The bag will try to get off the ground as the sun's rays (光线) heat (加热) it. It will get ……

levels of the atmosphere.Thermal turbulence 热力湍流Thermal turbulence 热力湍流When the sun heats the ground... bumpy air.When the sun heats the ground, some parts get hot faster than others. This makes warm air go ……

to me! By Vanilla Fu, 168 High School, Hefei, AnhuiLeft: Amazing! You are flying! How are you doing...!By Raymond Sun, 18, Longkou No 1 High School, Shandong ……

能). But the comet is flying away from the Sun. So on Sept 30, scientists chose to crash (撞毁) Rosetta on Comet ……

day, I went to Green Lake park, I saw hundreds of seagulls flying above the lake. A seagull just flew... and it sparkled (闪耀) in the sun. I brought some food for the seagulls. I held a handful of it and tossed ……