Why is the stress of the poem different?

In reading aloud, in order to accurately express meaning, thoughts and feelings, it is sometimes necessary to highlight those words or phrases that play an important role. The highlighted words or phrases are usually called stress or stress.

Some sentences, ordinary, have no special emotional color and no special emphasis. The stress of this sentence can be determined according to its grammatical structure.

There is no fixed rule about where a sentence should be stressed, but it is dominated by the environment, content and feelings of the speech. The same sentence, with different stress, often has different meanings.