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  4. 牛奶保鮮法的發明
介紹「巴斯德消毒法」和「利樂包」的發明故事。由於有這兩樣發明，才讓牛奶變得不易變質，也更容易攜帶，讓孩子明瞭現今的便利生活，源自前人的努力。

Details

Released
2018/10/11
Language
Traditional Chinese
Product Type
Video
Length
04:50
Resolution
720p
ID
137278
Provide Adobe DRM
No
Offer DRM free license
No

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