tides and tidal currents的意思|示意

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。