kē / xué / jiā / rèn / wéi / gǔ / rén / céng / tōng / guò / lù / qiáo / qiān / xǐ / dào / xīn / dà / lù

科学家认为古人曾通过陆桥迁徙到新大陆。

Scientists believe ancient people migrated to the New World across a land bridge.