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来源:雅诚德英语网
Central heating was present in every upper-middle-class home by the second half of the 19th century.
到19世纪下半叶,中央供暖系统已出现在每个中上层家庭里。
Central heating was present in every upper-middle-class home by the second half of the 19th century.
到19世纪下半叶,中央供暖系统已出现在每个中上层家庭里。