Scientists used to believe that people tamed cats to catch mice and protect the grain.

过去科学家们认为人们驯服猫是为了捉老鼠和保护谷物。

He found a half-drowned young crow another time an' he brought it home, too, an' tamed it.

又一次，他发现了一只差点淹死的小乌鸦，他也把它带回家，驯服了它。

Lions can never be completely tamed.

狮子永远不能被完全驯化。

Now that we've discussed how people in ancient societies tamed animals like cows and chickens for food and other uses.

现在我们已经讨论了古代社会的人们是如何驯养像牛和鸡这样的动物，并把它们作为食物和用于其他用途的。

It is still unclear whether domesticated cattle were tamed independently in northern Africa or introduced to the continent from southwest Asia.

目前还不清楚驯化的牛是在北非独立驯化的，还是从西南亚引入非洲大陆的。