历时近三百年，东北地区人口数量规模发生了巨大变化，尤其到中后期人口数量急剧增长。

During nearly 300 years, the enormous change had taken place in the scale of population of the Northeast, especially in the middle and later periods the number of population had increased sharply.

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康内斯托加式宽轮篷车，这种与众不同的货运马车的历史可以追溯到18世纪中后期宾夕法尼亚州兰卡斯特县的康内斯托加河流域。

The origins of the distinctive horse-drawn freight wagon known as the Conestoga wagon can be traced to the Conestoga River region of Pennsylvania's Lancaster County in the mid - to late-18th century.

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从40年代初期到40年代中后期，穆旦作为学院派青年诗人受到老一代诗人的重视，同时得到具有学院背景的青年批评家的积极评价。

From the early 40s to the late 40s, Mu Dan, as a younger academic poet, received more attention from the older generation and was highly appraised by the young critics of the academic background.

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