Spring tides : semi - diurnal tides of large range occur when the moon is new or full 大潮：出现在每个月朔或望的时期，潮差特别大的潮汐。
2.
Semi - diurnal tide : a tidal pattern in which there are two high tides and two low tides in a day 半日潮：每日出现两个涨潮和两个退潮的潮汐类型。
3.
Using the split steps finite element method , the varied - boundary two - dimensional numerical model of diurnal tide and tidal current in the luoyuan bay is constructed 摘要采用不规则三角形网格的分步杂交法，建立罗源湾海域二维变边界全日潮汐和潮流数值模型。
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