During Qin and Han dynasty, natural disasters have broken out for a great number of times.
秦汉时期,自然灾害就曾多次爆发。
参考来源 - 秦汉社会防灾减灾制度研究·2,447,543篇论文数据，部分数据来源于NoteExpress
During the Qin Dynasty and the Han Dynasty tourism was quite prevalent and the composition of the majority of tourists had the features of the time.
秦汉时期旅游活动已很兴盛，其旅游主体的构成也很有时代特色。
Tang dynasty saw ideological emancipation and resuscitation of the various schools of thought put forward by the exponents during the period from pre-Qin times to the early years of the Han Dynasty.
唐代思想解放，诸子学说重兴，沉寂多年的墨学亦受到重视，唐中期韩愈、柳宗元等都对墨学做过研究。
AlthoughChina's dietetic culture developed and grew prior to the Zhou Dynasty, it truly flourished during the Zhou, Qin, and Han dynasties (1122 BC -220).
虽然中国的饮食文化发达和增长之前的周朝，它真正的繁荣在周，秦，秦汉(公元前1122年- 220年)。
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