重力是一种很强的拉力。不管物体处在地球的什么位置,哪怕是在地球外的宇宙空间里,也不管物体是轻是重,重力都会吸引它。现在,我们跟着外福来去大自然里看一看,你会惊叹重力的威力的!树叶都掉下来了秋天到了,很多树的叶子都变黄了。秋风一吹,一片片树叶开始在风中跳舞。它们的舞姿多美呀!它们飘哇、飘哇,慢慢悠悠地来到了地面。树叶很轻,它们为什么不能一直飘着呢?是谁,用什么力把它们拉向地面了呢? Gravity is a very strong pull. Regardless of where the object is located on Earth, even in the extraterrestrial space, regardless of whether the object is light or heavy, gravity attracts it. Now, let’s go out and look at nature with the outsiders, and you will marvel at the power of gravity! The leaves fall. The autumn is over, and the leaves of many trees turn yellow. Autumn wind blowing, leaves began to dance in the wind. They dance beautiful! They float wow, floating wow, slowly came to the ground leisurely. The leaves are light, why can not they always float? Who, what force to pull them to the ground?