纵观整个历史，美国人一直是个迁移的民族。

Throughout their history Americans have been people on the move.

youdao

纵观整个历史，美国人一直是个迁移的民族。

Throughout their history, Americans have been people on the move.

youdao

纵观整个历史，美国人一直是个迁移的民族。

Throughout their history, Americans have been people on the move.

youdao