2_62_day light night light
Let's read and find out science 2 (科2)
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- 2_61_You're aboard spaceship Earth2951:44
- 2_62_day light night light3408:55
- 2_63_energy makes things happen3412:38
- 2_66_how people learned to fly4210:12
- 2_67_switch on switch off3610:21
- 2_68_What is the world made of6146:08
- 2_69_what maks a magnet4837:52
- 2_70_Where does the garbage go2739:01
- 2_72_where do polar bears live4112:33
- 2_73_what happens to our trash5020:41
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