From about 1830 onwards in the USA and from about 1870 in Canada, European settles began to move westward.
From about 1830 onwards in the USA and from about 1870 in Canada, European settles began to move westward.
在美国大约从1830年,加拿大从1870年起,欧洲移民开始向西部迁移.
From about 1830 onwards in the USA and from about 1870 in Canada, European settles began to move westward.
在美国大约从1830年,加拿大从1870年起,欧洲移民开始向西部迁移.