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12 の - 翻訳

Some basic science videos you should try at home
Some basic science videos you should try at home

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14 の - 翻訳

This is how binary system works. Great explanation!
This is how binary system works. Great explanation!

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15 の

The impact on the teeth of the child who sucks thumb

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16 の

How engineers think differently and why it\s so helpful

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14th Century Bridge Construction
14th Century Bridge Construction

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