Having heard so many stories like this, I just feel I am like a balloon, which is seemingly flying high but is actually upheld by the cloud, and which is seemingly "full" but actually very "empty".

听多了这样的故事，便常常觉得自己像只气球，仿佛飞得很高，仔细一看却是被浮云托着；外表看上去也还饱满，但肚子里却是空空。

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A high-flying balloon which soared over Antarctica may have answered one of cosmology's greatest questions by revealing that the universe may be "flat".

一只在南极洲升空的高空气球解答了宇宙学的一个最大问题：我们的宇宙是“平的”。

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