第五集——克洛·维斯石矛头克洛·维斯石矛头，距今约于一万三千年前以上，出土于美国亚利桑利州。

Clovis point (made over 13, 000 years ago). Stone spearhead found in Arizona.

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我们这块石制砍砸器正是当初利基发掘成果之一。

Our stone chopping tool was one of the ones that Leakey found.

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这样，大卫用机弦甩石，胜了那非利士人，打死他。大卫手中却没有刀。

So David triumphed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him.

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