Spring and fall, tidal water level is low, are a good crab catching season.
春天和秋天，潮水的水位很低，都是捉螃蟹的好季节。
The shallow water wave theory is employed in the description of tidal flows.
潮流场计算是基于浅水波理论。
The post process of the calculation of water wave and tidal current is studied.
对波浪、潮流计算的后处理进行了初步研究。
Submarine pipelines land generally from deep water to shallow water, through tidal zone.
海底管道大都是由深水到浅水，经过潮差段登上陆地的。
Submarine pipelines land generally from deep water to shallow water, through tidal zone.
海底管道大都是由深水到浅水，经过潮差段登上陆地的。
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