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了解地球妈妈
01 Understanding Earth
了解地球的结构
Understanding the Structure of the Earth
地球的最外部是地壳、地壳下面还有地幔、外地核和内地核。地球的内核是地球最热的一部分，它和太阳表面一样热哦。
The outermost part of the Earth is the crust, and below it there are earth mantle, outside earth core and inland Core.
The inner core is the hottest part of the Earth, which is equally hot as the surface of the sun.
地球的天文年龄
你知道吗？我们的地球已经有45.5亿岁啦！
今年是第54个世界地球日哦！
You know what? Our planet already has been 4.55billion years old!
This year marks the 54th anniversary of Earth Day.
怎么关爱地球
How to care for the Earth
手工制作环保袋
Make reusable bags by hand
生活中的塑料袋很难溶解，会造成严重的"白色污染"，所以今天我们要来亲手制作一个可以反复利用的环保袋。
Plastic bags in life are hard to dissolve and can cause severe "white pollution", so today we are here to make one that children can reuse.
拓印
Rubbing
阳光、花草、艺术与欢乐都是大地的馈赠。
Sunshine, flowers, art and joy are gifts of the earth.
