Pre-Columbian American life expectancy was between 25 and 30 years.

哥伦布发现美洲大陆前的美国人均寿命在 25 到 30 岁之间。

Here you will see the most impressive presentations extending from pre-Columbian times to the present day.

在这里，您将看到从前哥伦布时期到当今最令人印象深刻的演示。

We'll visit Guatemala, an economic leader in Central America, with dramatic volcanos, evocative pre-Columbian temples, bustling towns, and colorful markets.

我们将访问中美洲的经济领导者危地马拉，那里有壮观的火山、令人回味的前哥伦布时期的寺庙、繁华的城镇和色彩缤纷的市场。

The nature of these gifts varied over time in pre Columbian times the gifts were predominantly food would carvings, canoes, copper and slaves.

这些礼物的性质随着时间的推移而变化，在前哥伦布时期，礼物主要是食物、雕刻品、独木舟、铜和奴隶。