"已知事物" 用英语可以表达为 "known thing" 或 "known object." 这两个词都可以用来表示已知的东西或物品。

来源：

"Known" 是英语中的形容词，意思是 "已知的" 或 "众所周知的"。

"Thing" 是英语中的名词，意思是 "事物"、"物品" 或 "东西"。

英文例句及其中文翻译：

"I already know about that thing." (我已经知道那件事了。)
"He showed me a picture of the known object." (他给我看了一张已知物品的图片。)
"She is known for her expertise in this area." (她因专业知识而闻名。)
"The known thing was located at the bottom of the lake." (已知的物品被发现在湖底。)