The construction of the roller compacted concrete dam needs four dry seasons and four flood seasons to reach the design elevation.
碾压混凝土拦河坝工程须经过四个枯水期四个汛期的施工才能达到设计高程。
Hydraulic fill dam is a fast and economic method for dam building, but the construction of filling is confined by seasons owing to long freezing period of cold zone at high latitude.
水坠筑坝是我国创造的一种快速、经济筑坝方法，但高寒地区冰冻期长，冲填施工受到季节限制。
City square is an important part of city construction. We should construct proper city square in north area according to the advantage of obvious seasons.
广场是城市建设不可或缺的一部分，我们应利用并发挥北方四季分明的优势，打造适合北方地区的城市广场。
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