核心问题
He and I look alike, his birth certificate says his father was mine, and I wish I'd known about him a long time ago. (B. Clinton, My Life) (p. 5)
[原译]里昂和我长得很像。他的出生证表明他的父亲就是我的父亲。要是很久以前就认识了里昂，那该多好。（《我的生活》，p.3）
上面的译文把knowabout译为“认识”，对吗？
词典解答
know与knowabout的词义完全不同。前者可以译为“认识”，后者应当译为“听说”。见下条。
[试译]……要是很久以前听说过他,就好了。