Article
科學常識 爬山利器, Common Knowledge in Science. Useful Tools for Mountain Climbing.
Keywords: sports, science,
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左圖上為爬山之繩索繫車 The Left Picture Showings a Climbing Rope Bound to a Cart
Keywords: invention,
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下圖為越山船越山之情形 The Picture Below Shows a Mountain-Crossing-Boat Crossing the Canyon