In the marginal seas adjacent to Yantai, tides are regular semidiurnal tides; and tidal currents are diurnal currents.
在烟台外海，潮汐属于正规半日潮性质，而潮流属于日潮流性质。
Two types of tidal energy can be extracted: Kinetic energy of currents due the tides and potential energy from the difference in height (or head) between high and low tides.
两种类型的潮汐能可提取：电流，由于潮汐的动能和势能之间的高度，从在涨潮和退潮(或主管)的差异。
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