本文通过对位于上海同身西侧的赵巷孔进行孢粉和微古分析，论述上海地区全新世海平面变化。
The sea level changes of Holocene in Shanghai region are discussed in this paper based on the spore - pollen and microfossil analysis of Zhaoxiang core.
在从公元前5世纪至公元前221年的战国时期，秦、魏、赵、齐和燕各国建立广泛的防御工事来保卫自己的边界。
During the Warring states Period from the 5th century BC to 221 BC, the states of Qin, Wei, Zhao, Qi and Yan all constructed extensive fortifications to defend their own borders.
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