Keep reading the answers under the pencil.

1 was ridiculed and distrusted by others. The hero's frustration can be clearly found in this article.

2, the meaning of quotation marks: the meaning and intention of quotation marks have a certain deviation, because the hero's bad habits make others feel uncomfortable, so he is not a "specific person" in the eyes of others.

3. The word "once is once" cannot be removed many times, which shows that the protagonist has been laughed at and looked down upon many times, reflecting the author's unfortunate experience.

It is his spirit of devoting himself to science and benefiting mankind that answers this question.

Perseverance can make the stone fall to the ground.