我们的下一件物品是人类走出非洲，走向全世界时最初带在身上的物品，这被称之为石器时代的瑞士军刀。
Our next object is the tool that people took with them when they first left Africa and began to spread around the world - it's been called the Swiss Army knife of the Stone Age ...
我们的下一件物品是人类走出非洲，走向全世界时最初带在身上的物品，这被称之为石器时代的瑞士军刀。
Our next object is the tool that people took with them when they first left Africa and began to spread around the world - it's been called the Swiss Army knife of the Stone Age ...
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