He is a well-known writer.

他是一个有名的作家。

I just wanted to show a well-known writer's good manners to the common readers.

我只是想向普通读者展示一位知名作家的良好风度。

She is a well-known writer of children's books.

她是一位著名的儿童读物作家。

For all I know, he was a well-known writer before.

据我所知，他以前是个有名的作家。

I was conscious of my ignorance, and if Mrs. Strickland was a well-known writer I thought it as well to ascertain the fact before I spoke to her.

我知道自己孤陋寡闻，如果思特里克兰德是一位名作家，我在同她谈话以前最好还是把情况弄清楚。