high tide is a stage in the tide cycle process & low tide is a stage in the tide cycle process & the tide cycle occurs regularly twice per day -> low all and top all in the all sets occur twice per twilight high tide and low tide in the tide cycle occur twice per day  high tide and low tide in the tide cycle occur twice per day & a all is a mean of artificial wire -> high tide and low tide in the tidy cycle are the natural event that occur twice per day