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All four of these countries lagged considerably behind in the early nineteenth century.
这四个国家在19世纪早期都相当落后。
youdao
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In the early nineteenth century, people did mot use stamps.
十九世纪初，人们并不使用邮票。
youdao
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In the early nineteenth century, people did mot use stamps.
十九世纪初，人们并不使用邮票。
youdao