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Elon Musk abandons the 700 mph Hyperloop dream for a more realistic 200 mph underground system

Elon Musk is reviving his Hyperloop ambitions with a proposal for a high-speed underground tunnel connecting Austin and San ...
BBC

What is a World Heritage Site? 什么是世界遗产？

Wimbledon: The oldest tennis tournament explained 温网：历史最悠久的网球锦标赛 Episode 220630 / 30 Jun 2022 Practise your English listening skills with this story ...
BBC

World’s oldest known cave art 世界上已知最古老的洞穴壁画

Wimbledon: The oldest tennis tournament explained 温网：历史最悠久的网球锦标赛 Episode 220630 / 30 Jun 2022 Practise your English listening skills with this story ...