⑵ The word "mighty" in the first sentence of a poem shows how much sorrow the poet left.
(3) Three or four sentences in the poem express the poet's willingness or ambition to devote his life energy and even his life even if he resigns and retires. These two poems contain the philosophy that "falling red" seems useless, but from another angle, it can turn mud into flowers and still have value and function. It contains that everything in the world has two sides. "Useful" and "useless" are not absolute, but relative.