As he was reading the contents of the letter, while talking to an unknown individual on the phone, he became increasingly agitated.

他看信的内容的同时，正在和一个未知的个人打电话，他兄弟的出现更加剧了紧张局势。

youdao

The structure and contents of the book, its key chapters, and the educational method it employs are examples of the unknown or unpredictable aspects of the book project.

这本书的内容和结构，它的关键章节，教学方法都是这本书中未知或不可预期的例子。

youdao

Nuwas was reported to favor the drink, and indeed, the statue at the park's entrance features Baghdad's bard clutching a cup, the contents of which are unknown.

的确，在公园大门处这位巴格达诗人的雕像就端着个酒杯，不过酒杯里装的什么就没人知道了。

youdao

There was his claim that he hated high school, and there were three files on his computer, written in July and early September, whose contents are unknown but whose file names are Gah.docx, sorry.docx, and Why is everything so painful.docx.

NEWYORKER: The Story of a Suicide

The key for the file has yet to be released, and its contents are still unknown.

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The exact contents of the pills are unknown but they could contain a cocktail of different substances.

BBC: AMT and Rockstar