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1. 在上一个冰河时代，人们穿越连接亚洲和北美的古老陆桥。

   zài shàng​yī​ge bīng​hé​shí​dài, rén​men chuān​yuè lián​jiē yà​zhōu hé běi​měi de gǔ​lǎo lù​qiáo.

   During the last ice age, people journeyed across the ancient land bridge connecting Asia to North America.

   Source: CCMatrix