As is said by Author Unknown, "Some people succeed because they are destined to, but most people succeed because they are determined to."
佚名作者说，“有些人成功，因为他们注定要成功，但大多数人成功，是因为他们有成功的决心和勇气。”
The author does imply this by talking about unknown species.
作者确实通过谈论未知物种暗示了这一点。
In my newspaper column some months ago, I reprinted a short essay on youth by Samuel Ullman, an author unknown to me.
数月前，笔者在敝报专栏转载了一篇论青春的短文，对作者塞缪尔·厄尔曼其人我并无所知。
It was written by an unknown author.
该书的作者是匿名的。
It was written by an unknown author.
该书的作者是匿名的。
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