会让人上瘾的动图
How A Key Open The Lock开锁原理
https://skuimg.com/u/20190207/14312863.gif
How Trumpet Functions
小号如何工作
https://skuimg.com/u/20190207/14201736.gif
How Coins Are Filtered
硬币是怎样过滤分类的
https://skuimg.com/u/20190207/14205532.gif
How Sewing Machine Works
缝纫机工作原理
https://skuimg.com/u/20190207/14205980.gif
How a Zipper Works
拉链如何工作
https://skuimg.com/u/20190207/14210233.gif
How Your Heart Functions
心脏的工作原理
https://skuimg.com/u/20190207/14210498.gif
How a Gun Works
枪的工作原理
https://skuimg.com/u/20190207/14211520.gif
How a Grenade Works
手榴弹如何工作
https://skuimg.com/u/20190207/14212590.gif
How a Fan Works
电扇工作原理
https://skuimg.com/u/20190207/14214082.gif
How are necklaces made
项链是怎么做的
https://skuimg.com/u/20190207/14215116.gif
Chain making machines
环状铁链制作
https://skuimg.com/u/20190207/14222765.gif
Food processing machines
食品加工机器
https://skuimg.com/u/20190207/14224722.gif
圈圈蝴蝶饼干
https://skuimg.com/u/20190207/14231952.gif
奶油夹心饼干
https://skuimg.com/u/20190207/14233971.gif
脆皮甜筒
https://skuimg.com/u/20190207/1423576.gif
麦当劳派
https://skuimg.com/u/20190207/14243328.gif
Smart inventions
机智的发明
https://skuimg.com/u/20190207/14245312.gif
https://skuimg.com/u/20190207/14251558.gif 这个很好玩啊
这个真是涨了知识了。学习了
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