The Song Dynasty was comparatively weak in military in the ancient China because of some in-depth historical reasons.
宋代是我国古代社会中军事力量相对薄弱的一个朝代，造成这种局面有其深层次的历史原因。
SONG Qiu-he; WANG Lu; GE Lan; et al Department of Dermatology; Southwest Hospital Affiliated the Third Military Medical University; Chongqing 400038; China;
江西九江学院临床医学院皮肤性病科； 重庆市第一人民医院皮肤科；第三军医大学西南医院皮肤科；
SONG Qiu-he; WANG Lu; GE Lan; et al Department of Dermatology; Southwest Hospital Affiliated the Third Military Medical University; Chongqing 400038; China;
江西九江学院临床医学院皮肤性病科； 重庆市第一人民医院皮肤科；第三军医大学西南医院皮肤科；
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