Two treatises by the Swedish art historian Oswald Siren on the city walls, gates, and palaces of Peking appeared in 1924 and 1926.是什么意思_Two treatises by the Swedish art historian Oswald Siren on the city walls, gates, and palaces of Peking appeared in 1924 and 1926.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句