世界上最难学的25种语言

25 Of The Most Difficult Languages To Learn In The World by Juan Castillo Learning a different language can be fun and open new possibilitie »

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自动电饭锅的发明之战

The Battle to Invent the Automatic Rice Cooker The biggest names in Japanese technology vied to bring them to market. COOKING RICE ON A STOV »

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我们为什么有这么多人?

Why are there so many humans? Having lots of kids is great for the success of the species. But there's a hitch. Today the total population o »

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