Say the phrase' swim fish and fine stones, look straight at it. The expressive function of "fierce wave rushes like an arrow" in the text.

I think it is paving the way for the author's lofty sentiments and heroism in walking the rivers and lakes. Only after experiencing the test of all things in nature can he become a strong man in life and enjoy the beautiful scenery. Walking in the forest is expensive and far, and there are wonders in no man's land! The ancients said: the transcendent world outlook is often far from danger, and outstanding people are there; Therefore, people without ambition and strength can't get there. That's the truth!