Definition: the regular rise and fall in the level of the sea Level: B2
高潮通常一天发生两次。
High ___tide usually occurs twice a day.
当潮水退去时，你可以探索潮汐池。
When the ___tide is out, you can explore the tidal pools.
我们决定只在潮水上涨时去游泳。
We decided to go swimming only if the ___tide is in.
