According to Yan Jian's expression and actions before his death, write what he wanted to say but didn't say at this time.

(1) explanation

(2) It is found that people can fly when dreaming.

(4) It is a phenomenon that important discoveries in the world are sometimes despised or even persecuted because people don't understand, are unaccustomed, are considered absurd or violate the conclusions of predecessors.

(3) Copernicus discovered Heliocentrism. As a result, he was afraid of being punished by the church and did not disclose the truth. Bruno insisted on Heliocentrism and was executed by the church. Harvey found poor blood circulation and was burned to death.

Second,

(1) has been exhausted

(2) Yan Jiansheng is about to die. Yan Jiansheng has something to say.

(3) Trembling, eyes gradually turning up, eyebrows frowning, nasal wheezing, and pale complexion from khaki. Two calloused fingers were put down helplessly. I looked at the lamp helplessly, then at Zhao's nephew and the nurse holding my brother, which made me struggle all over and shouted: "Light …". It suddenly dawned on everyone that Jane gave up her hand heavily, swallowed her last breath and died.