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The aircraft can fly backwards -By ER Baby

The aircraft can fly backwards -By ER Baby

iOS Universal Books

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"Aircraft can fly backwards" through the eagle, geese and small rabbits and this pilot’s story vividly described the function and performance of the helicopter. It helps to answer the children’s question of "How do you fly a helicopter?
ER children's stories mainly make children-oriented stories commonly related to answer some popular science inquiries. Through the story, the children will learn some natural phenomenon and principles which they usually encounter in their daily lives, also these stories are great help in enlightening the scientific path of children’ exploration.

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Repair of some problems, optimizing function.

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