Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 19世纪时一部分地区有全年教学计划，主要是出于经济原因。
Some parts of the country had year - round programs in the ninety ( 19th ) century mostly for economic reasons 国家一些地区在19世纪开始全年教学主要是由于经济原因。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 在19世纪，美国一些地区施行全年制教育工程，主要是因为经济原因。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 美国部分地区在十九世纪就实施全年的教育制度，尤其是为了经济原因。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 美国部分地区19世纪就已经实行了全年制计划，这主要是由于经济上的原因。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 美国部分地区在19世纪实施过全年制教育计划，这主要是由于经济原因造成的。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 在19世纪，美国的一些地区有过全年制教育工程，这大部分是经济原因造成的。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 在19世纪，美国的一些地方就实施全年制教育模式，这主要是由于经济方面的原因。
Some parts of the country had year - round programs in the 19th century , mostly for economic reasons 在十九世纪，国家某些地区已经开始实行全年制计划，这些计划大多数都是出于经济的原因。
Husbands of all respondents in the study in 1998 were working in the manufacturing industries and went to work in the mainland due to economic reason 所有被访者的丈夫均从事制造业，他们因为经济的理由到内地工作。
