详细解释:被认为是
词意辨析：
be known as, be known for, be known to, be known in这些都是be kown与不同介词搭配的词组。
be known as: 意为“作为......而著名”，其后的名词表示一个人的身份、职业等。liu huan is known as a singer.
刘欢作为一个歌手而出名。we’re sure you’ll be well-known as an artist.
我们相信你会成为一位著名的画家。
be known for: 意为“因......而著名”，其后所接内容表示某人或物的特点、特长等。guilin is known for her beautiful mountains and rivers.
桂林因其美丽的山水而闻名。mr geldof is well-known for organizing two big pop concerts on the same day.
盖尔多夫先生因在同一天组织两场大型的流行音乐会而出名。
be known to: “为......所了解／知道”，其后接表示人的词语。“（人们都）知道”，其后接动词原形。he is known to all in our village.
村子里的人都了解他。he was known to have invented many things．＝it was known that he had invented many things.
人们都知道他已经发明了很多东西。
be known in: 意为“在某地很著名”。he is well-known in the town where he was born.
他在自己出生的那个镇子上很出名。例句：
He was known as a reliable man.他以可信赖的人着称。