.在整個十七世紀、十八世紀以至十九世紀的部份時間里，奴隸制度在美國東北

.在整個十七世紀、十八世紀以至十九世紀的部份時間里，奴隸制度在美國東北部及中部太西洋地區中是合法的。

結果 (英文) 1:

Throughout the seventeenth century, the eighteenth century as well as part-time in the nineteenth century, slavery was legal in the US northeastern and central western regions too.

結果 (英文) 2:

Throughout the seventeenth, eighteenth and 19th centuries, slavery was legal in the northeastern and central American Pacific regions.

結果 (英文) 3:

Throughout the seventeenth, eighteenth, and nineteenth centuries, slavery was legal in the northeast and Central Pacific regions of the United States.